What is the primary classification trait used to explain how scientists divide rocks into the three classification groups?
a. Composition
b. Formation
c. Location
d. Texture

Answers

Answer 1

Composition and texture is the primary classification trait used to explain how scientists divide rocks into the three classification.

How are rocks divided into the three classification groups by scientists?

Rocks can be categorized in one of two ways: first, according to the processes by which they form, with rocks being categorized as either sedimentary, igneous, or metamorphic. Grain or crystal size is another common way to categorize rocks.

Two criteria—texture and composition—are used to categorize rocks. The sizes, shapes, and relationships between the various mineral grains and other components that make up a rock are what determine its texture. The process that created the rock controls these elements.

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Related Questions

1. Find the force due to gravity if the mass of the object is 2300 kg
and the mass of the other object is 4000 kg. The distance
between the two objects is 0.150 m.

Answers

The force due to gravity will be 0.0272 Newtons.

What exactly does gravitational force signify?

The force between two mass-containing objects that are drawn toward one another is referred to as the gravitational pull. There is gravity everywhere around us. For instance, it maintains the planets in our solar system in orbit around the Sun. Additionally, because to gravity, the Moon maintains its orbit around the Earth.

How to calculate gravitational force in the above question?

Despite being weak and appealing, gravitational forces exist.

Given, mass of one object= 2300 kg

mass of another object= 4000 kg

distance between the two objects= 0.150 m

value of G is universal, [tex]G= 6.67[/tex]×[tex]10^{-11}[/tex] [tex]N m^{2} / kg^{2}[/tex]

the equation is, [tex]F=G\frac{M1 . M2}{d^{2} }[/tex]

                       [tex]F=0.0272 N[/tex]

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determine the energy levels and the corresponding eigenstates for a par- ticle of mass m, subject to a potential energy v (x) g

Answers

An energy eigenstate can always be written as (x,t) = (x)e-iEt/1. Probability density is equal to |(x,t)|2 (x,t) (x)e-iEt/1 * (x,t) ψ*(x)e+iEt/1 = ψ (x) The wave function *(x) = |(x)|2 exhibits time-dependent phase.

V's role in the Schrodinger equation?

For the system of a particle or particles interacting with a set of constraints, V(x) is a potential energy function. These restrictions can be compared to fields that exert a force on the desired particle or particles.

What is the energy eigenvalue?

The term "energy eigenvalues," which comes from the German word eigen, which means "characteristic" or "unique," refers to such particular discontinuous (step-like) energies. We refer to these energies as discrete energy eigenvalues or as quantized energies.

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The energy levels and the corresponding eigenstates of a particle of mass m subject to a potential energy v(x) g can be determined by solving the time-independent Schrodinger equation.

What is potential energy?

Potential energy is energy that is stored and can be released in the future. It is the energy of position or condition, as opposed to kinetic energy which is energy in motion. Potential energy can be stored in many forms such as gravitational, chemical, elastic, nuclear, and electromagnetic. Gravitational potential energy is the energy stored in an object due to its position in a gravitational field, while chemical potential energy is the energy stored in the bonds of chemical compounds. Elastic potential energy is energy stored in objects that can be stretched or compressed, such as a spring, while nuclear potential energy is the energy stored in the nucleus of an atom. Electromagnetic potential energy is the energy stored in the electric and magnetic fields of an object.

The energy levels and the corresponding eigenstates of a particle of mass m subject to a potential energy v(x) g can be determined by solving the time-independent Schrodinger equation:
Hψ = Eψ
Where H is the Hamiltonian operator, ψ is the wavefunction, and E is the energy. For a particle of mass m subject to a potential energy v(x) g, the Hamiltonian can be written as:
H = -(h2/2m)*d2/dx2 + v(x) g
The solution of the Schrodinger equation for this Hamiltonian yields the energy levels E and the corresponding wavefunctions ψ. The energy levels are determined by solving the equation:
E - v(x) g = 0
This equation can be solved for the different energy levels E, and the corresponding wavefunctions can then be determined by solving the Schrodinger equation. The wavefunctions represent the probability distribution of the particle, and are determined by the boundary conditions imposed by the potential energy.
In summary, the energy levels and the corresponding eigenstates of a particle of mass m subject to a potential energy v(x) g can be determined by solving the time-independent Schrodinger equation. The energy levels are found by solving the equation E - v(x) g = 0, and the corresponding wavefunctions are found by solving the Schrodinger equation.

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suppose that experiment 1 and experiment 2 are conducted at the same time; one student drops the ball from rest at the same instant that a second student horizontally rolls an identical off the table. after both balls have traveled half their vertical distance to the floor, what is the acceleration of the center of mass of the two-ball system relative to earth?

Answers

The two-ball system's center of mass will accelerate at a rate of "g" with respect to the earth.

What is a system's center of mass?

It represents the system's average location as weighted by each component's mass. The center of mass for straightforward stiff objects with homogeneous density is found at the centroid.

How can the center of mass of a symmetrical object be determined?

Finding the center of mass for symmetrical objects is significantly easier because symmetrical points on one side of the item will negate those same points on the other. Consider a uniform cylinder that is upright as an illustration.

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a dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 15 rpm in 10.0 s. assume the merry-go-round is a uniform disk of radius 2.5 m and has a mass of 330 kg, and two children (each with a mass of 25 kg) sit opposite each other on the edge. calculate the torque required to produce the acceleration, neglecting frictional torque. what force is required at the edge?

Answers

Refer to the photo taken.

Where does the depenent variable go on a graph?

Answers

The dependent variable go on the Y-axis on a graph.

what is a dependent variable?

The dependent variable is described as the variable that is being measured or tested in an experiment.

Dependent variable can be explained using the example where a test score could be a dependent variable because it could change depending on several factors such as how much you studied, how much sleep you got the night before you took the test, or even how hungry you were when you took it.

The independent variable is found on the x-axis (horizontal line) of the graph and the dependent variable is displayed on the y-axis.

The difference between independent variable and the dependent variable is that in an experiment, the independent variable is the variable that is varied or manipulated by the researcher.

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the force between between two objects increases by what factor if the distance between them is changed 4.5 times the original separation?

Answers

The new gravitational force between the object will be 1/20.25 times of the original force.

The gravitational force between any two object is defined as the product of the masses of the object and it is inversely proportional to the square of the distance between them which is given by,

F = GMm/R²

Here,

G is the universal gravitational constant, M and m are the mass of the body and R is the distance between them.

As per the given question the distance between the object is increased 4.5 times the original separation.

R' = 4.5R.

The new force of attraction between the object will be,

F' = GMm/(R')²

F' = GMm/(4.5R)²

F' = GMm/20.25R²

F' = F/20.25

So, the new force of attraction between the two objects will become 1/20.25 times of original force.

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a point at an antinode of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 msms . what is the wire'??s mass?

Answers

The relation between the time-period of the transverse wave for the third harmonic and the time between the maximum displacement and minimum displacement is [tex]=16.3 \mathrm{~g}[/tex]

[tex]$$T_3=2 t$$Substitute$8.40 \mathrm{~ms}$[/tex]

for t in the above expression.

[tex]$$T_3=2(8.4 \mathrm{~ms})\left(\frac{10^{-3} \mathrm{~s}}{1 \mathrm{~ms}}\right)$$[/tex]

The wave velocity can be given by the following expression [tex]=0.0168 \mathrm{~s}[/tex]

[tex]v=\frac{\lambda_3}{T_3}[/tex]

Here,

[tex]$$\lambda_3$$[/tex]

is the frequency of third harmonics and

[tex]$$T_3$$[/tex]

is the time-period of third harmonics.

Substitute [tex]$0.1296 \mathrm{~m}$[/tex] for

[tex]$$\lambda_3$$[/tex]

and

[tex]$0.0168 \mathrm{~s}$ for$T_3$[/tex]

[tex]\begin{aligned}& v=\frac{0.1296 \mathrm{~m}}{0.0168 \mathrm{~m}} \\& =7.714 \mathrm{~m} / \mathrm{s}\end{aligned}[/tex]

The expression of the wave velocity is given by the following expression.

[tex]v=\sqrt{\frac{T}{m / L}}[/tex]

Rearrange the above expression for

[tex]$$m$$[/tex]

[tex]\text { Substitute } 5.00 \mathrm{~N} \text { for } T, 0.1944 \mathrm{~m} \text { for } L \text {, and } 7.714 \mathrm{~m} / \mathrm{s} \text { for } v \text { in the above expression. }[/tex]

[tex]\begin{gathered}m=\frac{(5.00 \mathrm{~N})(0.1944 \mathrm{~m})}{(7.714 \mathrm{~m} / \mathrm{s})^2} \\=(0.0163345 \mathrm{~kg})\left(\frac{1000 \mathrm{~g}}{1 \mathrm{~kg}}\right) \\=16.3 \mathrm{~g}\end{gathered}[/tex]

The anti-nodes in the standing waves are at a distance half a wavelength. The time-period is twice the time from maximum displacement to minimum displacement of the anti-node.

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a constriction in a pipe reduces its diameter from 4.0 cm to 2.0 cm. where the pipe is narrow the water speed is 8.0 m/s. where it is wide the water speed is:

Answers

The velocity on the narrow side is 11.6 m/s. This is the velocity of the water in the narrow part of the pipe.

How to find velocity ?

To find the velocity of the water where the pipe is narrow, you can use the formula for the mass flow rate, which is given by:

Mass flow rate = Density * Flow rate

= Density * (Area * Velocity)

Where:

Density is the density of the fluid

Flow rate is the volume flow rate, or the rate at which volume flows through the pipe

Area is the cross-sectional area of the pipe

Velocity is the velocity of the fluid

The mass flow rate is constant, so you can set the mass flow rate on either side of the constriction equal to each other and solve for the velocity on the other side.

The cross-sectional area of the pipe on the narrow side is given by the formula for the area of a circle:

A = pi * r^2

Where:

A is the cross-sectional area of the pipe

r is the radius of the pipe

The radius of the pipe on the narrow side is 3 cm / 2 = 1.5 cm. Plugging this value into the formula for the cross-sectional area, you get:

A = pi * (1.5 cm)^2

= 7.07 cm^2

The cross-sectional area of the pipe on the wide side is given by the same formula, with a radius of 6 cm / 2 = 3 cm:

A = pi * (3 cm)^2

= 28.27 cm^2

Since the mass flow rate is constant, you can set the mass flow rates on either side of the constriction equal to each other and solve for the velocity on the other side:

(Density * 7.07 cm^2 * v) = (Density * 28.27 cm^2 * 8 m/s)

Solving for v, the velocity on the narrow side, you get:

v = (Density * 28.27 cm^2 * 8 m/s) / (Density * 7.07 cm^2)

= 11.6 m/s

The final value for the velocity on the narrow side is 11.6 m/s. This is the velocity of the water in the narrow part of the pipe.

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Classify the type of reaction below.
C2H6 + O2
--> CO2 + H2O
a. Synthesis
b. Decomposition
c. Combustion
d. Single Replacement
e. Double Replacement

Answers

Answer: Synthesis

Explanation: You are combining multiple Elements

- Determine the tension in each cable in the diagram to the right.

Answers

Tension of the three cables connecting the  celling, 7 kg ball, 4 kg ball,  5 kg ball respectively 156.8 N,  88.2 N and 49 N.

What is tension?

The force communicated through a rope, string, or wire when two opposing forces draw on it is known as tension. The tension force pulls energy equally on the bodies at the ends and is applied along the entire length of the wire.

Tension of the cable connecting the  celling and 7 kg ball:

= (7 kg + 4 kg + 5Kg) × 9.8 m/s²

= 156.8 N.

Tension of the cable connecting the  7kg ball and 4 kg ball:

= (4 kg + 5Kg) × 9.8 m/s²

= 88.2 N.

Tension of the cable connecting the  4kg ball and 5 kg ball:

= 5Kg× 9.8 m/s²

= 49 N.

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a force of 40 n is needed to keep a 10-kg steel box sliding across a level floor with a constant velocity of 8 m/s. what is the net force on the box?

Answers

The net force on the box is 40N.

A net force is what?

The net force acting on an object is the result of all pushing and pulling forces acting on the object collectively (the sum). If there is an imbalance in the pushing and pulling forces acting on an object, the object will accelerate in the direction of the net force.

According to Newton's second law, an object's acceleration is inversely proportional to its mass and proportional to both the resultant force and the resultant force.

Force = m × a

40 = 10 × a

a = 40/10

a = 4m/s²

Net force ∑F = m×a

∑F = 10 × 4

∑F = 40N.

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Uing two billiard ball and 3 to 4 entence decided experiment to demontrate the law of conervation of momentum. (4 point)

Answers

So let's talk about billiard balls and the law of conservation of momentum. For the purposes of this simplified discussion, momentum is always conserved for collisions between balls.

What is momentum?Momentum is a commonly used term in sports. A team that has the momentum is on the move and is going to take some effort to stop. A team that has a lot of momentum is really on the move and is going to be hard to stop. Momentum is a physics term; it refers to the quantity of motion that an object has. A sports team that is on the move has the momentum. If an object is in motion (on the move) then it has momentum.Momentum can be defined as "mass in motion." All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion. The amount of momentum that an object has is dependent upon two variables: how much stuff is moving and how fast the stuff is moving. Momentum depends upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.

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on average, how much time separates the rise of one civilization in the galaxy from the rise of the next?

Answers

Between climbs, 100,000,000,000/1,000,000 equals 100,000 years. Our civilization is quite young compared to most or all of the others because it just emerged a few thousand years ago.

How much time separates the rise of one civilization in the galaxy from the rise of the next?

Turn-based strategy video games like Civilization have been around since 1991. Sid Meier created the first game in the series and contributed creatively to the majority of the others; as a result, the formal titles of these games, such Sid Meier's Civilization VI, typically include his name.

An sophisticated condition of human society with highly developed institutions of government, culture, industry, and shared social conventions is known as a civilization.

Between climbs, 100,000,000,000/1,000,000 equals 100,000 years. Our civilization is quite young compared to most or all of the others because it just emerged a few thousand years ago. Given these plausible hypotheses, it is likely that there are no other civilizations that are younger than 50,000 years old.

The complete question is :Time Between Civilizations. Suppose that there are 100 billion stars in the Milky Way Galaxy, that 1 in 1 million stars gets a civilization at some point, and that these civilizations have arisen at random times over the past 5 billion years. On average, how much time separates the rise of one civilization in the galaxy from the rise of the next? Based on your answer, should we expect to make radio contact with another civilization that is either at or below our own current level of technological development?

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an explosion of gas from a hawaiian volcano blows a rock into the sky. the rock has 2000j of kinetic energy. what was its mass if the rock had a velocity of 20m/s? ( ke

Answers

The mass of the rock will be 20 kg. This can be determined from the kinetic energy equation, k = 1/2 mv².

What is the straightforward meaning of kinetic energy?

Kinetic energy, which may be seen in the movement of an item or subatomic particle, is the energy of motion. Kinetic energy is present in every particle and moving object. Kinetic energy may be transmitted from one thing to another, for example during collisions, and is determined by the mass of an item and its movement or speed.

How to solve the question?

Given in the question,

Kinetic Energy of rock = 2000J

Velocity of rock = 20 m/s

also, k.e. = 1/2 mv²

       2000 = 1/2 m × 20²

       m = 20 kg

The mass of rock that blew in the sky was 20 kg.

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Does the addition od 5N forces always give a 10 N force?

Answers

max

=5+10=15N and F
min

=10−5=5N
Range of resultant 5≤F≤15
therefore , 4N can't be the resultant of these two force

1. A car moving 11 m/s accelerates at 1.5 m/s². How fast is it moving after it accelerates for 50
seconds?
Type a response (show work please)

Answers

We may be aware that, for example, a car leaving a stop sign would move farther in a given amount of time the faster it accelerates.

what an acceleration is?

acceleration is the rate of change in both speed of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. So because direction is always shifting, motion on a circle accelerates even while the speed is constant.

What prompts accelerating?

An object's velocity is altered by a net force, and acceleration increases with net force. To accelerate at the same rate as less massive objects, more massive objects need greater net forces.

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a mass m at the end of a spring oscillates with a frequency of 0.83 hz. when an additional 780-g mass is added to m, the frequency is 0.60 hz. what is the value of m?

Answers

Given the following data:

Initial frequency = 0.83 Hz.

Additional mass = 780 grams to kg = 0.78 kg

New frequency = 0.60 Hz

To determine the value of the initial mass, m, we would apply the following formula:

;f=1/2л⟌k/m

Where:

F is the frequency.

m is the mass

k is the spring constant.

For mass (m):

0.83=1/2л⟌k/m    ...equation 1.

For additional mass:

0.60=1/2⟌k/m+0.78  ...equation 2.

Next, we would divide eqn. 1 by eqn. 2:

;0.83/0.60=1/2л⟌((k/m)/1)/2л⟌m+0.78

1.3833=⟌k/m/⟌k/m+0.78

Taking the square of both sides, we have:

1.9135=k/m/k/m+0.78

1.9135=k/m×m+0.78/k

1.9135=m+0.78/m

1.9135m-m=0.78

0.9135m=0.78

m=0.78/0.9135

m=0.8538kg

the value of mass is 0.8538.

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9) During a game of bowling, which of the following describe the ball's motion?(SELECT ALL ANSWERS THAT APPLY)

A) The ball is accelerated while it is pushed by the student's hand due to an
unbalanced force.
B) The ball slows down as it rolls because friction exerts an unbalanced force.
C) The ball is accelerated while it is held in the student's hand due to balanced
Forces.
D) The ball does not change its motion as it rolls because of the balanced force
provided by friction.
E) The ball does not change its motion while it is held in the student's hand due to
balanced forces.

Answers

During a game of bowling the ball's motion:

The ball is accelerated while it is pushed by the student's hand due to an unbalanced force.The ball slows down as it rolls because friction exerts an unbalanced force.The ball does not change its motion while it is held in the student's hand due to balanced forces.

The correct options are A,B and E.

Description of a bowling ball's motion

Bowling ball motion is commonly divided into sequential skid, hook, and roll phases. When the ball moves down the lane in the skid and hook phases, frictional contact with the lane causes the ball's forward (translational) speed to continually decrease, but to continually increase its revolution rate (rotational speed).

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disregarding friction, how far will the cart move in 3.2 s, starting from rest? answer in units of m.

Answers

If the cart moves in 3.2 seconds from rest, then the distance traveled by cart is 2 meters.

Which definition of distance suits you best?

How do you define distance? Regardless of direction, distance measures an object's overall movement. Distance is defined as the amount of ground covered by an object, regardless of its starting or stopping position.

Horizontal force acting on the cart, F = 11 N

Mass of the cart, m = 35 kg

To find,

Distance covered by the cart in 3.5 seconds if it starts from rest.

Solution,

Let x is the distance moved by the cart. It can be calculated using the second equation of motion as :

s = 1.925 meters

What is the definition of a distance?

In terms of "how much land an object is covered" while traveling, distance—a scalar quantity—describes this. Displacement is a vector number that expresses the overall change in the object's location, and it is related to the phrase "how far from place the thing is."

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how would you characterize atmospheric conditions if the adiabatic lapse rate is steeper than the environmental lapse rate

Answers

The atmosphere is deemed to be completely unstable if the environmental lapse rate is higher than the dry adiabatic lapse rate.

How do lapse rate circumstances relate to the stability of the atmosphere?

Higher than dry-adiabatic lapse rates are unstable and promote vertical motion. In the absence of saturation, an atmospheric layer is neutrally stable if its lapse rate coincides with the dry-adiabatic rate. Any existing vertical motion is neither slowed down nor accelerated in this case.

What separates adiabatic lapse rate from environmental lapse rate?

The adiabatic lapse rate is the rate at which an air parcel's temperature is varying adiabatically.

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solar eclipses are slightly more common than lunar eclipses. why, then, is it more likely that your region of the country will experience a lunar eclipse than a total solar eclipse? umbra

Answers

It has been estimated that solar eclipses occur around three times more frequently than lunar eclipses. However, that statistic fully disregards penumbral lunar eclipses.

The total number of solar and lunar eclipses is about equal when penumbral lunar eclipses are taken into account.Eclipses of the sun and moon happen about equally frequently. Because Earth's shadow on the Moon is far greater than the Moon's shadow on Earth during a solar eclipse, lunar eclipses happen more frequently. The probability of seeing a lunar eclipse is therefore higher than the probability of seeing a solar eclipse.When the Moon passes through the shadow of the Earth, a lunar eclipse can be seen from wherever on Earth that the Moon is above the horizon, which covers more than half of the planet. The Moon's shadow, however, is far smaller than Earth's when it seems to move in front of the Sun during a solar eclipse. When projected onto the surface of the Earth, it is only approximately 480 km (300 miles) wide.

As a result, only a small portion of the Earth can observe solar eclipses, making it challenging to travel to a spot where one may be seen. They are therefore less frequently visible from any given position.

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A physics student walks 6 meters east, 4 meters north, then 9 meters
west. What is the student's magnitude of displacement from starting
position?

Answers

Answer:

5 m

Explanation:

Displacement is the straight-line distance from the starting point to the end point.  Student ends up 4m north and 3m west from where he started. Use pythagorean theorem to solve for displacement (d).  

d² = 3² + 4² = 25

d = [tex]\sqrt{25}[/tex] = 5 m

Or, if you remember from geometry, a right triangle with legs of 3 and 4 has a hypotenuse of 5 (3-4-5 right triangle)

a 65 kg person dives into the water from the 10 m platform. a. what is her speed as she enters the water?

Answers

The speed of the person as she enters the water is 14.2 m/s.

What is kinetic energy?

Kinetic energy is the energy of motion. It is the energy that an object has due to its motion. This energy can be transferred from one object to another or converted into other forms of energy. Kinetic energy is dependent on an object's mass and its velocity. The greater an object's mass or velocity, the more kinetic energy it has. Kinetic energy can be used to do work, such as powering a machine or vehicle. It can also be used to generate electricity or to heat up objects.

The speed of the person as she enters the water can be calculated using the equation for kinetic energy:
KE = ½mv²
Where m is the mass of the person (65 kg) and v is the speed.
Solving for v, we get:
v = √(2KE/m)
Since the potential energy of the person just before she enters the water is equal to the kinetic energy of the person just after she enters the water, we can calculate the kinetic energy as:
PE = mgh
KE = mgh
Where m is the mass of the person (65 kg), g is the acceleration due to gravity (9.8 m/s²), and h is the height of the platform (10 m).
Plugging this into the equation for v, we get:
v = √(2mgh/m)
v = √(2gh)
v = √(2*9.8*10)
v = 14.2 m/s

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Kendell's mom buys him a new bowling ball that has a mass of 4 kg. He rolls the ball with an average speed of
30 m/s. What is the average kinetic energy of Kendell's ball when rolling?

Answers

Answer:

1800J

Explanation:

E = ½mv²

E = ½(4)(30)²

E = 2 x 900

E = 1800J

a 97.5 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. if the period of oscillation is 11.2 s, what is the spring constant of the bungee cord?

Answers

According to the given statement 4.88 N/m  is the spring constant of the bungee cord.

What is the spring constant k?

The spring stiffness is quantified by the spring constant, or k. For various springs and materials, it varies. The stiffer the spring is and the harder it is to stretch, the bigger the spring constant. K stands for the proportionality constant, commonly referred to as the "spring constant." The k variable in Hooke's law (F = -kx) represents stiffness and strength in simple words.

Briefing:

Mass m= 97.5 kg

period T= 11.2s

The period expression is provided as

T=2π√m/k

Substitute

11.2= 2*3.142*√97.5/k

square both sides

11.2^2= 2*3.142*97.5/k

125.44= 612.69/k

k=612.69/125.44

k= 4.88 N/m

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Maher is trying to find the density of a plastic toy. The toy’s mass is 160 g.
Maher placed the toy in a graduated cylinder that has 70 ml of water, the water level increased
till 150 ml.
a) Find the toy’s volume.

Answers

The volume of the toy is 80 ml.

To find the volume of the plastic toy, Maher can use the principle of buoyancy. When an object is placed in a fluid, it will displace an amount of fluid equal to its own volume. The volume of the displaced fluid can be measured and used to calculate the volume of the object.

In this case, Maher has placed the toy in a graduated cylinder filled with water, and he has observed that the water level increased from 70 ml to 150 ml. This means that the toy displaced 150 - 70 = 80 ml of water.

The volume of the toy is equal to the volume of the displaced water, so the toy's volume is 80 ml. This is the volume of the toy when it is completely submerged in water.

It's important to note that the volume of an object can change depending on its temperature, pressure, and other factors. To get an accurate measurement of the volume of the toy, Maher should make sure to measure the volume of the displaced water carefully and under controlled conditions.

Answer:

Volume of the toy: [tex]80\; {\rm mL}[/tex].

Average density of the toy: [tex]2\; {\rm g\cdot mL^{-1}}[/tex] (or equivalently, [tex]2\; {\rm g \cdot cm^{-3}}[/tex].)

Explanation:

The graduated cylinder initially measures the volume of water in this cylinder:

[tex]V(\text{water}) = 70\; {\rm mL}[/tex].

Assume that the toy is submerged in the water. The graduated cylinder would then measure the volume of the water and the toy, combined:

[tex]V(\text{water}) + V(\text{toy}) = 150\; {\rm mL}[/tex].

Rearrange to find the volume of the toy:

[tex]\begin{aligned}V(\text{toy}) &= 150\; {\rm mL} - V(\text{water}) \\ &= 150\; {\rm mL} - 70\; {\rm mL} \\ &= 80\; {\rm mL}\end{aligned}[/tex].

To find the average density of this toy, divide mass by volume:

[tex]\begin{aligned}(\text{average density}) &= \frac{(\text{mass})}{(\text{volume})} \\ &= \frac{160\; {\rm g}}{80\; {\rm mL}} \\ &= 2\; {\rm g\cdot mL^{-1}}\end{aligned}[/tex].

Hydroelectric systems generate electricity using the energy of falling water. A pumped storage hydroelectric system can also be used as a way of storing energy for future use. Explain how​

Answers

It is obvious that In the pumped storage method, a pumped water is stored in a reservoir using unique pumps. Electric pumps consume electric power, however, and so the logic of the pumped storage methods seems poor but this is not so. Water is usually pumped during off-peak hours of power consumption. An essential reason for the pumped storage method is water-level control to make sure that the power station operates at all means or indefinitely. This reason reflects the economics of power generation as well.

what is hydroelectric system?

hydroelectric is a renewable energy also known as hydroelectric power,( hydropower), electricity that is produced from generators driven by turbines that convert the potential energy of falling or flowing water into mechanical energy.

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ernie is trying to swim directly across a rushing river. ernie can swim at a rate of 6.2 m/s. the river's current is moving at a rate of 10.7 m/s. calculate the magnitude of ernie's resultant velocity?

Answers

The magnitude of Ernie's resultant velocity is    [tex]V=8.72m/s[/tex].

Velocity:

Velocity is the direction in which an object is moving and serves as a measure of the rate at which its position is changing as seen from a specific point of view and as measured by a specific unit of time. In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.

Given,

Ernie's swimming rate with respect to the river   [tex]V_{ER} =6.2 m/s[/tex]

River's current rate [tex]V_{R}=10.7 m/s[/tex]

Hence,

         The magnitude of Ernie's resultant velocity

                                               [tex]V[/tex] = [tex]V_{R} -V_{ER}=10.7i - 6.2j[/tex]

                                              [tex]V=\sqrt{(10.7)^{2}-(6.2)^{2} }[/tex]

                                              [tex]V=8.72m/s[/tex]

Hence,

           The magnitude of Ernie's resultant velocity is  [tex]V=8.72m/s[/tex].

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a pendulum is pulled to a height of 1.28 m above the lowest position and released. what is its speed at the level of the lowest position?

Answers

The speed at the level of the lowest position is 5.01m/s.

How do you conserve energy?

Energy cannot be created or destroyed; it can only be changed from one form of energy to another, according to the law of conservation of energy. This implies that a system always has the same amount of energy, barring external energy addition.

To reduce expenses and protect the resources for future use, energy conservation is necessary. The environment is contaminated by the harmful gases released into the atmosphere by conventional energy sources. Traditional energy sources are finite and could run out one day.

This is a typical energy conservation question, Set the kinetic energy at the bottom and the potential energy at the height to be equal.

mgh = 1/2mv²

gh = v²/2

v = √2gh

v = √2×9.8×1.28m/s

v = 5.01m/s.

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it would take approximately years to receive light from a civilization on the opposite side of the galaxy. a. 100000 years. b. 10 yrs. c. 100 yrs. d. 1/4 of a year.

Answers

It would take approximately 100,000 years to receive light from a civilization on the opposite side of the galaxy. The correct answer is, therefore (a) "100,000 years".

This is because the distance between the Earth and the opposite side of the galaxy is approximately 100,000 light-years. Light travels at a speed of approximately 300,000,000 meters per second, so it would take approximately 100,000 years for light to travel from the opposite side of the galaxy to the Earth.

A light-year is a unit of distance that is equal to the distance that light travels in one year. Light travels at a very high speed, approximately 300,000,000 meters per second, so it is able to cover a large distance in a relatively short amount of time.

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