a boy is 3ft tall. if he jumps into a pond,which appear to be in less depth than 3ft,will he sink or not? give reason
No, he will not sink. A 3ft tall person will not be able to submerge in a pond that is less than 3ft deep.
What is submerge?
You immerse your body in water when you swim. Your head isn't submerged if it's above the water; it's just wet. You should immerse a washcloth in a bowl of water to thoroughly soak it. It is believed that William Shakespeare created the word "submerge." Although we cannot be certain of this, we do know that the word was first written down and subsequently read by someone when it appeared in the play Antony and Cleopatra.
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a ball is thrown horizontally with an initial velocity of 20 ms from the top of a tower 60 m high
From the peak of the tower, it will fall 92.2 meters to the ground.
Vi(vertical) = 0;
h = 60 m;
h = Vi*t + 1/2g*t2;
60 = 0; t = 60/5;
time = 12; t = sqrt(12) seconds;
t = 3.5 seconds.
Vi(horizontal)=20 m/s
20 m/s remains constant since there is no force opposing it in the horizontal direction.
70 meters are equal to 20 m/s times 3.5 seconds in range.
70 meters from the tower's base, the ball will land on the ground.
distance from the tower's summit is equal to sqrt(702+602)
= sqrt(4900 + 3600), or 92.2 meters.
From the peak of the tower, it will fall 92.2 meters to the ground.
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A coin is tossed vertically upward and reaches a maximum height of 0.90 m before it comesback down. With what velocity was it thrown, and how long was it in the air?
with explanation please
Answer:
how long the coin was in the air was about 45 how I got your answer was by dividing 900 by 20 bc when u divide u have to add a 0 so that's how I got 900 then I just divided and got 45
Part A
Choose the correct free body diagram for the case when the ball is at its lowest point
The correct free body diagram for the case when the ball is at its lowest point is tension pointing upwards and weight of the object pointing downwards.
What is the tension in the string at the lowest point in circular path?
The tension in the string at the lowest point in a circular path is equal to weight added to centripetal force required.
Mathematically, the formula for the tension in the string is given as;
T = W + ma
where;
W is the weight on the stringm is the mass of the objecta is the acceleration of the objectAt the lowest point the acceleration of the object is zero, a = 0. The new equation becomes the following;
T = W
The free body diagram of the tension and the weight of the object is given as;
↑ T
Ф
↓ W
Thus, the correct free body diagram consist of the tension force pointing upwards and the weight of the object pointing downwards.
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What is limited quantities exemption?
A limited quantity exemption is the term used for the shipment of goods
The limited quantity exemption is applied for good which are being shipped in a limited quantity and not in large quantity as they are dangerous or the manufacture has a small quantity stock.
A limited quantity item is an item that is only available for a limited time or in a limited quantity. An example of a limited quantity item would be a limited edition item that is only available for a limited time.
What is limited quantity?
Dangerous goods that are shipped throughout small containers and packed in boxes as well as shrink-wrapped trays are referred to as limited quantities.
Some of the standard dangerous goods packaging and or labelling regulations do not apply to smaller quantities of hazardous materials packaged in individual bottles because they pose less of a risk than when they have been transported in larger volumes, but they must be identified by the a Limited Quantity Label.
The hazard class and division again for substance or item, the size of the inner receptacle, and the overall package weight all play a role that whether or not a hazardous material can be shipped as a Limited Quantity.
Therefore, the limited quantities are also subject to different upper and lower bounds under UN numbers, and some UN numbers need not allow LQ at all.
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On Earth - your weight will change depending on ______.
A. the weather
B. your mass
C. fig newtons
Answer:
C
Explanation:
This is because the weather has no account in the weight of an object and the mass of an object is always fixed
On Earth your weight will change depending on mass. The correct option is B.
What is weight?An object's mass is a measure of its inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted by gravity on the object, or the force required to support it.
On Earth, Newton's laws define the weight of a body (or any other object) as mass times gravitational acceleration (w = m x g). That is, the weight of an object is determined by the gravitational pull on it.
The weight of an object would differ on Earth and the Moon due to the influence of gravity. Basically SI unit of mass is the kilogram (kg).
Body weight measurement in sports is important for assessing body composition and tracking weight changes as a result of diet and exercise.
Thus, the correct option is B.
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How will you convert an iron nail into a magnet with the help of electric current?
To finish the electromagnet, connect the copper wire's exposed ends to the opposing battery connections. A magnetic field is produced by current passing via the wire coiled around the nail.
What causes electric current?A loose electron is drawn to a proton to become neutral if an electron moves to the wire. Lack of electrons can result from pushing electrons from out their orbits. Electric current is the name given to the constantly moving electrons in wire.
What is electric current and its types?Electrons are moving constantly in current electricity. Direct current (DC) and dc voltage (AC) are the two types of current used in electricity (AC). Electrons move only in the direction of direct current. Direct current is produced by batteries. The resistance to potential difference ratio determines the current. It is displayed as (I). I = V/R is the formula currently in use.
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Suppose two identical objects are sitting 1 meter apart. The gravitational force between them is 9N. What would the gravitational force be if they were moved to 3 meters apart?
If the distance between the objects is increased, the new force would be 1N
What is the gravitational force?The term gravitational force has to do with the force that acts between two masses that are on the earth's service.
Now we know that the force that acts on the object can be given by;
F = Gm1m2/r^2
F = force that acts on the object
G = gravitational constant
m1 and m2 = masses of the objects
r = distance about
We can now see that the force that acts on the object would be 1 N.
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The graph represents the reaction 2H₂ +0₂2H₂0 as it reaches equilibrium. Based on the graph, which two statements about this reaction are true?
A. After point 2, the rate of formation of products is equal to the rate of formation of reactants.
B. At point 2, the concentrations of H2O,H2, and H2 are all changing toward their equilibrium concentrations.
C. The rate of formation of products is equal to the rate of formation of reactants only after point 4.
D. At point 1, more reactants are converted to products than products are converted to reactants.
At point 1, more reagents are converted to product than products are converted to reactants, and at point 2, the concentrations of H20, O2, and H2 are all moving toward their equilibrium concentrations.
What are equilibrium and an example?The word equilibrium is derived from the Latin word libra, which means weight or balance.an open book that is lying flat. a vehicle that is going steadily. a chemical reaction that has equal forward and reverse reaction rates.
What practical applications of equilibrium exist?In order to sustain a blood pH around 7.35 and 7.45, carbon dioxide (H2CO3) & bicarbonate anion (HCO3) are buffers found in human blood. Death may result from a value of greater than 7.8 or less than 6.8.
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A mass on the end of a length of rope is being swung in a circle of radius 3.2 m at an angular velocity of 0.71 rad/s. How fast is it moving?
Answer:
[tex]\huge\boxed{\sf v = 2.27\ m/s}[/tex]
Explanation:
Given data:Angular velocity = ω = 0.71 rad/s
Radius = r = 3.2 m
Required:Linear velocity = v = ?
Formula:v = rω
Solution:v = (3.2)(0.71)
v = 2.27 m/s
[tex]\rule[225]{225}{2}[/tex]
What do you know about the force that you exert on the chair?
The normal force exerted by the chair on us, when we sit on the chair.
When an object interacts with another object, it feels a push or a pull. Each object that two objects make contact with experiences a force. Once the encounter is over, the force between the two objects is gone. Forces are merely interactions; they do not exist independently.
When two objects interact and appear to be in physical contact with one another, contact forces are generated. Several types of contact forces include frictional forces, tensional forces, normal forces, air resistance forces, and applied forces. Even when two interacting objects are far apart from one another, action-at-a-distance forces are still present.
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Two equal-mass stars maintain a constant distance
of 8.0 x 10^10 m and rotate about a point mid-
way between them at a rate of one revolution every
12.6 yr.
(a) Why don't the two stars crash into one
another due to the gravitational force between
them?
(b) What must be the mass of each star?
A. Centripetal force acting on the two stars is the reason why the two stars will not crash into one another
B. The mass of each stars, given they maintain a constant distance of 8×10¹⁰ m is 7.68×10²⁷ Kg
A. Why don't the two stars crash into one another?
Centripetal force is the force that acts to keep an object moving in a circle. Since the two stars undergoes revolution, this means they rotate in a circle. Thus, centripetal force is acting on them.
Therefore, we can say that the two stars will not crash into one another due to the centripetal force
B. How do I determine the mass of each stars?
We can obtain the mass of each stars as illustrated below:
F = GM₁M₂ / r²
Note: They rotate mid-way. Thus distance apart (r) = 2r
F = GM₁M₂ / (2r)²
F = GM₁M₂ / 4r²
Also, centripetal force is given as:
F = mv² / r
Thus, we have:
mv² / r = GM₁M₂ / 4r²
But
v = 2πr / T
v² = (2πr / T)² = 4π²r² / T²
M₁ = M₂ = m
Thus, we have
m4π²r² / rT² = Gmm / 4r²
4π²r / T² = Gm / 4r²
Cross multiply
mGT² = 4r² × 4π²r
mGT² = 16π²r³
Divide both sides by GT²
m = 16π²r³ / GT²
From the question given, we have:
Distance (r) = 8×10¹⁰ mPeriod (T) = 12.6 years = 12.6 × 3.154×10⁷ = 3.97×10⁸ sGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Pi (π) = 3.14Mass of each stars (m) =?m = 16π²r³ / GT²
m = [16 × 3.14² × (8×10¹⁰)³] / [6.67×10¯¹¹ × (3.97×10⁸)²]
m = 7.68×10²⁷ Kg
Thus, the mass of each stars is 7.68×10²⁷ Kg
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When cooking on a gas stove what energys are being made and explain each one?
Name that Newtonian law.
You exert a net force of 4 N to the right on an object with a mass of 8 kg, the object will accelerate at 0.5 m/s2 to the right.
A hockey puck slides on ice.
My car hits a mosquito, and the mosquito hits back, equally.
Mrs. Hankinson has a zero total external forces acting on her - she keeps moving at a constant velocity, if she is already moving.
You exert a net force of 4 N to the right on an object with a mass of 8 kg, the object will accelerate at 0.5 m/s2 to the right. Newton second law
A hockey puck slides on ice. Newton's first law
My car hits a mosquito, and the mosquito hits back, equally. Newton's third law
Mrs. Hankinson has a zero total external forces acting on her - she keeps moving at a constant velocity, if she is already moving. Newton's first law
What is the Newton law?We know that according to the Newton law, the reason for motion is force. As such the force that is exerted on a body is the reason why the object would move from one point to the next.
There are three laws of motion that was put forward by Newton. The first law explains the relationship between force and the inertia of an object. The second law addresses the relationship between rate of change of impressed force while the third force deals with the concept of action and reaction.
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what hazard class are automotive batteries walmart
The automative batteries are the corrosive hazard class.
The chemical present inside the battery are very corrosive and poisonous in nature.
Also if the batteries are excessively charged they can burst and cause a huge damage.
There is also very huge disposal problem associated with the battery because the chemical present inside the battery contain acidic material which will decrease the quality of the soil if they are buried in soil.
The human skin is also very sensitive towards the corrosive material of the battery.
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Two balls of clay are thrown and perfectly collide with each other. One ball of clay had mass of 42.9kg and a velocity of 58 m/s. The other ball of clay had a mass of 99.4 kg and an unknown velocity before the collision. If the velocity of the combined object was -38.6m/s after the collision. What was the velocity of the second clay ball before the collision?
Two objects have a perfectly elastic collision The first object has a mass of 34.2 kg and a velocity of 65.5m/s before the collision. The second object had a mass of 97.9kg and a velocity of -29.7 m/s before the collision. If the first object's velocity was -75.61m/s after the collision, what was the second objects velocity after the collision?
Answer:
19.59m/s
Explanation:
Using the law of conservation of linear momentum,
Total momentum before collision is equal to the Total momentum after collision.
What is a limited quantity exception?
The maximum quantity per inner package or article for shipping risky commodities in limited quantities is the limited quantity exception.
The term "limited quantity" could refer to a specific object that is only available in a limited number or to a sort of resource that is only available in a limited amount. A limited amount often refers to an item's limited availability, such as a limited edition item or a product with a limited supply. If you are exporting small amounts of dangerous items, you may be eligible for a Limited Quantity Exemption. This exception is a simpler regulatory option to fully regulate all DG shipments. If your goods are eligible for this exemption, a number greater than zero will appear in the column "Limited Quantity Index." Even if dangerous commodities are carried in restricted or acceptable quantities, there are still packing and labeling standards that must be met. Some national regulations do not include provisions for restricted quantity and excluded quantity.
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11. Why do the lights in your home come on almost instantaneously when you turn, on the switch?
A - When the circuit is completed, there is a rapid rearrangement of surface charges in the circuit.
B - Charges store energy. When the circuit is completed, the energy is released.
C - Charges in the wire travel very fast.
D - The circuits in a home are wired in parallel. Thus, a current is already flowing.
E - Charges in the wire are like marbles in a tube. When the circuit is completed, the charges push each other through the wire.
Answer:
because its like that which do not hencintrate and prostate in the future work per week-20 Earning in the future and we are keen on the walls of our english and would like the same to happen as soon.
1. What is the difference between a true desert and a high desert environment? Where in New Mexico do we find these areas?
A boy is skiing down a hill with a velocity of 3.5 m/s. It takes 8.5 seconds to
reach the bottom. What distance is the skier traveling?
O 0.41 meters
O29.75 meters
O 2.43 meters
O 12 meters
Answer:
B. 29.75 meters
Explanation:
Distance = speed x time
Distance = 3.5 x 8.5
Distance = 29.75 m/s
Perceiving is not essential to the thinking process and making sense of the world.
True
False
This statement about perception is true.
perceive: the input from our environment, sight, sound, taste, touch, temperature…we perceive the external inputs and process them to the best of our conscious abilities.
You mention thinking. Let's broaden that out a bit. Call it conceive: the internal abilities we both process perception and create with. Thinking, emotions, imagination, curiosity, learning, organizing, even fear are all conceiving attributes. This is the wonder and the horror of our species. We are homo sapiens. We are aware of ourselves, all that we perceive we and all that we conceive. More than thinking, much more. Be well.
perception involves the senses, whereas thought involves reasoning.
However, these two categories overlap, since they cannot function
apart, but only together. (As Kant quipped, “intuition without concepts
is blind, concepts without intuitions are empty.” By ‘intuition’ he meant
sense-perception, not some mystical insight into the universe.
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What is weight?
A. The force exerted on a body by gravity.
B. The amount of matter present in any object or body.
C. The physical body's resistance to acceleration when a net force is applied.
D. The measure of inertia of the body
Answer:
A
Explanation:
This is because gravity plays a role in the weight of an object that's from (Force = mass × acceleration due to gravity) and also weight is also a type of Force
difference of low frequency and high frequency waves
Answer:
Waves with a higher frequency have crests that are closer together, so higher frequency waves have shorter wavelengths.
Explanation:
a lead sphere has a diameter that is 0.050% larger than the inner diameter of a steel ring when each has a temperature of 29.3*C. Thus, the ring will not slip over the sphere. At what common temperature will the ring just slip over the sphere?
The common temperature at which the ring just slip over the sphere is 37.83⁰C.
What is the change in temperature of the lead ring?
The change in the temperature of the lead ring is calculated as follows;
ΔA/A = βΔθ
where;
ΔΑ is the change in area of the lead ringA is the original area of the lead ringΔθ is the change in temperature of the lead ringβ is the area expansivity of lead, = 58.6 x 10⁻⁶/⁰CΔA/A = 0.05% = 0.0005
Δθ = (ΔA/A) /(β)
Δθ = (0.0005) / (58.6 x 10⁻⁶)
Δθ = 8.53⁰C
The final temperature of the sphere = 29.3⁰C + 8.53⁰C = 37.83⁰C
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When you are sitting in a chair your body exerts a on the chair and the chair exerts the force back?
When we sit on the chair, the chair is actually plying a force back on us in response to our force wielded upon the president because of Newton's third law.
What is Newton's third law?
The third law of Newton asserts that when bodies interact, they ply forces that are equal in size and directed in the contrary direction. Another name for the third law is the law of action-reaction law. This law is pivotal for understanding issues with static balance, where all pressures are in balance, but it also remains true for bodies moving at a constant or accelerated speed.
It does not only use secretary styles the forces it represents are factual forces. For illustration, a book laying on a table exerts downcast pressure equal to the weight of the book on the table. The table produces an equal and contrary force on the book in agreement with the third law.
Thus, According to Newton's third law there's an equal and contrary action and counteracts us so that neither move.
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What energy transformations occur in your electromagnet when it is turned on?
An electromagnet converts electrical energy to magnetic energy, therefore this is the energy change that occurs.
What is an example of a electromagnet?An epr is a substance that is ordinarily non-magnetic but turns into a magnet when an electrical current flows through it. A curled loop and insulated loop of wire like a spring is a typical illustration of an electromagnet.
What are electromagnets and how do they operate?Electromagnets and armature windings are not always the same thing. Emitting energy from coils of wire, electromagnetic fields are created. Because moving charges create magnetic fields, an electromagnet's create compelling behave similar magnets when an electrical current passes through them.
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The pressure and volume of an ideal monatomic gas change from A to B to C, as the drawing shows. The curved line between A and C is an isotherm. Determine the total heat flow into or out of the gas for the process (including the algebraic sign).
The area of the pressure- volume curve will be the heat flow of the process. Here, the heat flow of the isothermal process is 8 ×10⁴ joules.
What is isothermal process?The process that occur in at constant temperature is called isothermal process. At constant temperature, the volume of a gas is inversely proportional to the pressure.
The area under the curve of a pressure - volume plot will be equal to the heat flow or work done in the process.
Here, the length of the rectangle is the difference in volume = 0.200 m³
height = pressure difference = 4.00 × 10⁵ Pa.
Thus area = 0.200 m³ × 4.00 × 10⁵ Pa
= 8 ×10⁴ joules.
Therefore, the heat flow out of the system is 8 ×10⁴ joules.
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11. Two identical cups containing sand from the same bag are placed on a balance.
Cip.A
Which statement about the volume and mass of the sand in the cups is correct?
A. The sand in Cup A has greater volume and greater mass than the sand in Cup B.
The sand in Cup A has greater volume and less mass than the sand in Cup B.
B.
C.
The sand in Cup A has less volume and greater mass than the sand in Cup B.
D. The sand in Cup A has less volume and less mass than the sand in Cup B.
The sand in Cup A has greater volume and less mass than the sand in Cup B.
What is volume?
Volume is a measurement of the three-dimensional space that is occupied.Numerous imperial or US customary units, as well as units derived from SI (such as cubic meter and liter), are often used to quantify it numerically (such as gallon, quart, cubic inch). Volume and length (the cube) have a symbiotic relationship.The volume of a container is usually understood as its capacity, not the amount of space it occupies. In other words, volume is the amount of fluid (liquid or gas) that a container can hold.Volume was initially measured using naturally occurring vessels of comparable shape and then using standardized vessels. Arithmetic formulas can be used to quickly calculate the volume of several simple three-dimensional shapes.To know more about volume, click the link given below:
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An aluminum can is filled to the brim with a liquid. The can and the liquid are heated so their temperatures change by the same amount. The can's initial volume at 6 °C is 7.0 × 10-4 m³. The coefficient of volume expansion for aluminum is 69 x 106 (C°) 1. When the can and the liquid are heated to × 78 °C, 7.8 x 106 m3 of liquid spills over. What is the coefficient of volume expansion of the liquid?
The coefficient of volume expansion of the liquid, βliquid is 2.24 * 10⁻⁴ (C°)⁻¹.
What is the coefficient of volume expansion of the liquid?The coefficient of volume expansion of the liquid is determined as follows:
Let the initial volume of the object be V₀
The change in the volume of the object will be ΔV
The expression for the change in the volume of the object when the temperature of the object changes by ΔT is:
ΔV = βV₀ΔT
where;
β is the coefficient of volume expansion
The data provided is as follows;
The initial volume of liquid and aluminum can, V₀ = 7.0 * 10⁻⁴ m³
The coefficient of volume expansion for aluminum = 69 x 10⁻⁶ (C°)⁻¹
The volume of liquid that spilled out, ΔV = 7.8 * 10⁻⁶ m³
Change in temperature, ΔT = (78 - 6)°C
ΔT = 72 °C
The difference between the change in volume of the liquid and the can is equal to the amount of liquid that spilled out.
ΔV = (βV₀ΔT)liquid - (βV₀ΔT)can
βliquid = ΔV/V₀ΔT + βcan
βliquid = (7.8 * 10⁻⁶ m³) / (7.0 * 10⁻⁴ m³ * 72 °C) + 69 x 10⁻⁶ (C°)⁻¹
βliquid = 2.24 * 10⁻⁴ (C°)⁻¹
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PLEASE HELP
Suri, a scientist at NASA, created models of each planet. The models contain the same properties as the actual planets, but at a smaller scale. The first property being tested is the density of the planets. Suri places each planet into a container of water. Which planet will float on top of the water?
A) Mercury
B) Venus
C) Neptune
D) Saturn
Answer:
Explanation:
Let's turn to the table of planetary densities:
Saturn will float in the water ( 0.7 g/cm³ < 1.0 g/cm³)
