Use the formula from the video to help you answer this question. Assume you are driving 20 mph on a straight road. Also, assume that at a speed of 20 miles per hour, it takes 100 feet to stop. If you were to increase your speed to 60 miles per hour, your stopping distance is now _____. Group of answer choices.

The horizontal component of a projectile's velocity remains non-zero constant for general projectile motion without air resistance. Projectile motion is the motion of an item as defined in physics.

Within the gravitational field. Projectile motion is exemplified by the upward vertical toss of a body. The air resistance that a body experiences during projectile travel is disregarded, leaving only the gravitational force to act on the body. A moving object's velocity is a function of time and measures how quickly its position changes in relation to a frame of reference. When an object is moving, its speed and direction are specified by its velocity. When an object moves, its location in relation to its environment changes.

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Answer:

m=4kg

Explanation:

F=32, m=?, a=8ms^-2

F=ma

32=8m

32/8=m

m=4kg

Answer:

BLACKPINK IN YOUR AREA I AM SO GOOD AT MATH

Explanation:

SO GOOD AT MATH BLACKPINK IN YOUR AREA

Answer:

Explanation:

C. When the benefits outweigh the costs.

The speed of the photon has been obtained as  8.9 * 10^5 m/s.

We know that the energy of the photon would be converted to the kinetic energy of the photon s it is moving. We would now go ahead to obtain the energy in joule.

We now have;

Energy in joules = 2.30 * 1.6 * 10^-19

= 3.68  * 10^-19 J

Then we know that;

KE = 1/2mv^2

KE = kinetic energy

m = mass of the electron

v = speed of the electron

Then

v^2= 2KE/m

v = √2KE/m

v = √2 *  3.68  * 10^-19/9.11 * 10^-31

v = 8.9 * 10^5 m/s

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A rock suspended by a weighing scale weighs 3 N when submerged in water and 5 N out of water. F= N1-N2. Substitute 5N for F1 and 3n for F2 above the expression to get F. F=5N-3N = 2N.

The weight of the water volume that the submerged object displaces is what creates the buoyant force. The buoyant force is the weight of water that has the same volume as the rock because the boulder is totally submerged. The buoyant force is still present even though the rock is sinking; it is merely smaller than the rock's weight.

Your perceived weight is equal to the normal force. Therefore, when the elevator accelerates upward or downward, you truly feel a little heavier than usual and a little lighter than usual.

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Answer:

Buoyant force B = V * ρ        volume * density

Since the buoyant force is the same in both cases (salt & fresh)

a smaller volume is required when the density of the displaced water is greater

(A) is correct

2.5 m/s is final angular velocity, given each had an initial speed of 2.50 m/s relative to the ice.

v1r1=v2r2

2.50×0.8=v2×0.8

v2= 2.5 m/s

The "angular velocity" of an object is the speed at which it rotates or revolves around an axis. This displacement is represented by the angle formed by a line on one body and a line on the other.

Technical terms like degrees, 360-degree rotations, and revolutions per minute are frequently used to describe angles or angular displacements (rpm). Angles and angular velocities are typically stated in radians and radians per second, respectively, in mathematics and physics. These converting factors link the following measurements: Radian per second is 1/30 of a radian, or 0.105, and a radian equals 1/180 of a degree, or 0.0175.

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The sphere is again attracted to the rod. The sphere must be empty from an insulating string.

As a result, the string efficiency of a suspension type insulator is defined as "the ratio of voltage across the whole string to the product of voltage across the disc nearest to the conductor and the number of discs in the string." Transmission lines on steel towers are supported by suspension insulators, which isolate the lines from the tower. They are critical to the reliable delivery of power. Suspension insulators are employed in two or more configurations depending on the transmission voltage and usage area. The string is free to swing in any direction, giving the transmission line a lot of flexibility.

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The distance between Jupiter and Saturn is much larger.

They are 403.3 million miles apart.

Distance is a numerical or every so often qualitative size of how some distance aside items or factors are. In physics or regular usage, the distance may check with a physical duration or an estimation primarily based on other criteria.

The space between two factors in physical space is the period of an immediate line among them, that's the shortest feasible course.

It reduces the entire international or part of the arena to a small sheet of paper. At the same time as making a map, cartographers pay attention to properly constitute the distance between two locations.

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The acceleration of the roll ramp is a = mR² sinθ / I + mR²

The mass of the given object is m

And the radius of the given object is r

the angle of the ramp is given as θ

The expression to calculate the given equilibrium of the object :

mgsinθ - f = ma

this implies f = m( a + gsinθ)

Here we can write

I a' = fR

a' = ( m ( a + gsinθ) ) R / I

The expression without the value of friction can be written as

a = Ra'

Substitute the values in the above expression and we will get:

I a = mR² ( a + gsin θ )

On further solving it by opening the brackets we get

a = mR² sinθ / I + mR²

The acceleration of the roll ramp is a = mR² sinθ / I + mR²

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If a chef drops a pumpkin pie of mass 1.7 kg from a height of 1.875 meter, the time taken by the pie to hit the ground is 0.62 s

According to equations of motion,

s = ut + 1 / 2 at²

s = Distance

u = Initial velocity

t = Time

a = Acceleration

Since it is dropped,

u = 0

g = 9.8 m / s²

s = 1.875 m

s = ut + 1 / 2 at²

1.875 = 0 + ( 1 / 2 * 9.8 * t² )

t² = 1.875 / 4.9

t² = 0.385

t = 0.62 s

Therefore, the time taken is 0.62 s

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Solar activity can produce auroras and communication blackouts on Earth  the correct statements from the following list.

A fraction of a second to billions of years are covered by the variations in the sun's magnetic field. Solar activity includes coronal mass ejections, high-speed solar winds, solar energetic particles, and solar flares.

Solar flares, coronal mass ejections, high-speed solar wind, and solar energetic particles are the four primary categories that may be used to categorise solar activity that is related to space weather. Only when a solar flare occurs on the sun's surface facing Earth do they have an effect on our planet.

The occurrence of events like solar flares and coronal mass ejections increases when the sun is active.

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Quantized energy levels and charge states. One wants to create dots as small as 5 nm using 3D metals.

According to Farré et al. (2011), quantum dots (QDs) are semiconductor nanocrystals with a reactive core that regulates their optical characteristics. These cores are constructed of semiconductors, such as zinc selenide (ZnSe), indium phosphide (InP), cadmium selenide (CdSe), and cadmium telluride (CdTe) (ZnSe).

The band gap energy level and size of a quantum dot are inversely correlated, which changes the frequency and color of the light emitted. Smaller objects produce more intense, bluer light.

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Answer:

Explanation:

Given:

V₀ = 0 m/s

m = 12 kg

t = 4 s

g = 9.8 m/s²

________

V - ?

Speed:

V = V₀ + g·t

V = 0 + 9.8·4 = 39.2 m/s

Jupiter's great red spot is a giant storm about three times wider than the diameter of Earth and at least 100 years old.

A massive storm larger than Earth that has been raging for hundreds of years is Jupiter's famous Great Red Spot.

Numerous moons orbit Jupiter around it. Jupiter also has a number of rings, but they are much fainter and made of dust rather than ice, unlike the well-known rings of Saturn.

It is mostly Jupiter's fault that it is difficult to comprehend the Great Red Spot. Jupiter is a gas-dominated planet that is a thousand times larger than Earth. Its core is surrounded by a liquid ocean of hydrogen, and the atmosphere is primarily made up of helium and hydrogen.

Jupiter's clouds also make it difficult to make precise observations of its lower atmosphere. While some studies of Jupiter have looked at regions in its lower atmosphere, orbiting telescopes and probes studying the Great Red Spot can only see clouds dispersed high in the atmosphere.

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Force is a vector quantity because its acceleration times a scalar constant (mass) equals the force (a vector quantity).

The product of an object's mass and acceleration is used to calculate the force acting on it. A vector quantity is acceleration. Since force is a scalar constant (mass) multiplied by acceleration, which is a vector quantity, force is also a vector quantity (a vector quantity).

Because it genuinely depends on the direction in which a force is applied, force can be thought of as a vector quantity. Physically, the force can be felt as a push or a pull. This is illustrated by many physical examples.

For instance, it makes sense that we must push an object upward in order to make it move upward. It simply remains fixed if we push it downward. Knowing which direction it is pushed is crucial.

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If there is a decrease in the angle of inclination, the acceleration would decrease accordingly.

We know that the acceleration is the change in the velocity of the object with time. Given that the mass of the pulley remains the same and the puly is being moved up the incline as we can see.

We have to also recall that we have been told that the incline is frictionless and as a result we are not going to consider the frictional force. In any case, the force that moves the pully along the incline stull depends on the angle of inclination.

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Electrons radiate when their regain their prior energies. Electrons gain energy & ascend into elevated amounts as they absorb energy.

The process of absorption is how the blood takes in the byproducts of digestion so that it can supply the rest of the body. The mucus allows again for passage of a digested materials into to the lymphatic system or blood during absorption. The following mechanisms allow for absorption. basic diffusion

Characteristics of absorption and digestion in general. Gastrointestinal products are absorbed through four different mechanisms: exocytosis, passive diffusion, simple diffusion, or endocytic.

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The bones of the skull includes the following:

What is the frontal bone?

The frontal bone in an adult is an unpaired bone that is a part of the boney structure that forms the anterior and superior portions of the skull.

The frontal bone consists of two parts which are

These two parts makes up the bony part of the forehead, part of the bony orbital cavity holding the eye, and part of the bony part of the nose respectively.

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The angular speed of the device is 1.03 rad/s.

A spinning system's ability to conserve angular momentum ensures that its spin will not change until it is subjected to an external torque; to put it another way, the rotation's speed will not change as long as the net torque is zero.

Using the conservation of angular momentum
[tex]L_{i} = L{f}[/tex]

Here, [tex]L_{i}[/tex] = the system's angular momentum before the collision

[tex]L_{i}[/tex] = 0 + mv[tex]d_{y}[/tex]

= (0.005)(450)(0.752)

= 1.692 kgm²/s

The moment of inertia of the system is given by

I = 2(M₁R₁² + M₂R₂²)+ mR₁²

= 2[(1.2)(0.8)² +(0.5)(0.3)²]+0.005(0.8)²

= 1.6292 kgm²

Here, [tex]L_{f}[/tex] = Iω

So,

1.692 = 1.6292(ω)

ω = 1.03 rad/s

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The angular speed of the device is 1.03 rad/s.

A spinning system's ability to conserve angular momentum ensures that its spin will not change until it is subjected to an external torque; to put it another way, the rotation's speed will not change as long as the net torque is zero.

Using the conservation of angular momentum

[tex]L_{i}=L_{f}[/tex]

Here,  = the system's angular momentum before the collision

[tex]L_{i}[/tex] = 0 + mv

= (0.005)(450)(0.752)

= 1.692 kgm²/s

The moment of inertia of the system is given by

I = 2(M₁R₁² + M₂R₂²)+ mR₁²

= 2[(1.2)(0.8)² +(0.5)(0.3)²]+0.005(0.8)²

= 1.6292 kgm²

Here,  = Iω

So,

1.692 = 1.6292(ω)

ω = 1.03 rad/s

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E1:E2 ratio is 0.60 for an item with total energy E moving at a speed of 0.70c. Total energy of the same thing (when travelling at 0.90c).In order to meet the energy needs of a growing global population.

Total energy  strives to deliver energy that is affordable, dependable, and cleaner. The speed of an object, also known as v in kinematics, is a scalar quantity that refers to the size of the change in that object's position over time or the size of the change in that object's position per unit of time is called as speed.

E = mc^2 = Moc^2/(1-(v^2/c^2))^1/2

for, 0.7c = 1/(1-(0.7^2))^1/2 = 1.4

for, 0.9c = 1/(1-(0.9^2))^1/2 = 2.294

E2/ E1 = 1.4/2.294 = 0.60

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P1+P2, P1-P2 and P2-P1  is the magnitude of their combined momentum.

Before the crash

p₀ = P1 + P2

After crash

pf = (m1 + m2) v

p₀ = pf

P1 + P2 = (m1 + m2) v = Pf

-Car 1 travels to the right

Car 2 =right

Pf = P1 + P2

Car2 = left

Pf = P1-P2

-Car 1 = left

Car 2= right

Pf = -P1 + P2

Car 2 = the left

Pf = -P1 -P2

Momentum is the result of a particle's mass and velocity. A vector quantity with both magnitude and direction is momentum. Isaac Newton's second equation of motion states that the force applied to a particle is equivalent to the time rate of change of momentum.

Any grouping of particles has a momentum equal to the vector sum of their momenta. A modification in one particle's momentum is perfectly balanced by a modification in the momentum of another particle, according to Newton's third law, which states that particles exert equal and opposite forces on one another.

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The initial velocity of the ball projected from the cliff is 5.8y m/s.

The ball projected from the cliff undergoes projectile motion.

The initial horizontal velocity of the ball is calculated as follows:

Velocity  = horizontal distance * time taken

The horizontal distance traveled by the ball is not given.

Let the horizontal distance traveled be y

The time taken for the ball to fall = 5.8 seconds

The velocity of the ball = y * 5.8

The velocity of the ball = 5.8y m/s

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The maximum speed with which the car can make the turn is 13.69 m/s (Option C)

We'll begin by obtaining the force. This can be obtained as follow:

F = μN

F = 0.75 × 15000

F = 11250 N

Finally, we shall determine the maximum speed. Details below:

F = mv²/r

11250 = (1500 × v²) / 25

Cross multiply

1500 × v² = 11250 × 25

Dive both sides by 1500

v² = (11250 × 25) / 1500

Take the square root of both sides

v = √[(11250 × 25) / 1500]

v = 13.69 m/s

Thus, the maximum speed is 13.69 m/s (Option C)

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The tension in the rope connecting the 6.0-kg block and the 4.0-kg block is closest to 42N.

From the information, we have obtained three equations for the three unknowns a, T1 and T2:

6a = T1 - 3g

4a = T2 - T1 - 2g

9a = 9g - T2

The third equations gives

T2 = 9g - 9a

Substituting that in the second equation gives:

4 a = 9 g - 9 a - T1 - 2 g

13 a = 7 g - T1

In this case, we have reduced the problem to two equations in two unknowns:

6a = T1 - 3g

13 a = 7 g - T1

Solving further will be:

78 a = 13 T1 - 39 g

78 a = 42 g - 6 T1

Subtracting the second from the first eliminates a:

0 = 19 T1 - 81 g

T1 = 81/19 * g

= 81/19 × 9.8

T1 = 42 N

The tension is 42N.

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Three factors that determine the amount of voltage induced into a conductor are : size of the magnetic field, active length of the conductor and speed at which the conductor passes through the field.

Faraday's Law explains that inducing a voltage in conductor can be done by either passing it through a magnetic field or by moving the magnetic field past the conductor and if the conductor is part of a closed circuit, an electric current will flow.

Coils of wire are used to increase the induced voltage and current because the EMF generated is proportional to the time rate of change of magnetic flux as per Faraday's Law.

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A comparison of an object's weight between the two worlds An object's weight is the same on both planets.

The weight of an object is determined by its mass and how strongly gravity pushes on it. How far apart two objects are from one another determines how strong gravity is. Because of this, the same thing weights differently on several planets.

The gravity of planets, moons, and stars is the same. Depending on their size, they have different amounts of gravity. Therefore, gravity is different for larger and smaller planets. A human with more mass has greater gravitational pull, just like the planets.

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A bow wave is produced when a speed boat moves nearly as fast as the waves it produces.

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Answer: BLACKPINK IN YOUR AREA SO GOOD AT MATH

Explanation:

PERIOD AHH MATH IS AAMAZING