What is the mass of a football kicked so that
it moves with a speed of 8 m/s with 80 J of
kinetic energy?

Answer:

Explanation:

Newton's Third Law states that "every action has an equal and opposite reaction". In a rocket, burning fuel creates a push on the front of the rocket pushing it forward. This creates an equal and opposite push on the exhaust gas backwards.

Answer:

j-6+82+181!

Explanation:

becus u just solve it

Answer:

The term referring to is radioactive decay.

To answer the question, we need to know the half-life of the radioactive material. Let's assume the half-life is 10,000 counts.

After one half-life, the count would be halved to 40,000 counts. After the second half-life, the count would be halved again to 20,000 counts. After the third half-life, the count would be halved again to 10,000 counts. And after the fourth half-life, the count would be halved again to 5,000 counts.

So after 4 half-lives, we would expect the count to be 5,000.

After 4 half-lives, the remaining number of counts would be calculated by dividing the initial number of counts by 2 raised to the power of the number of half-lives. In this case:

Initial counts: 80,000

Number of half-lives: 4

Remaining counts = 80,000 / (2^4) = 80,000 / 16 = 5,000 countsSo, after 4 half-lives, you would expect to have 5,000 counts remaining.

Answer:

The term referring to is radioactive decay.

To answer the question, we need to know the half-life of the radioactive material. Let's assume the half-life is 10,000 counts.

After one half-life, the count would be halved to 40,000 counts. After the second half-life, the count would be halved again to 20,000 counts. After the third half-life, the count would be halved again to 10,000 counts. And after the fourth half-life, the count would be halved again to 5,000 counts.

So after 4 half-lives, we would expect the count to be 5,000.

After 4 half-lives, the remaining number of counts would be calculated by dividing the initial number of counts by 2 raised to the power of the number of half-lives. In this case:

Initial counts: 80,000

Number of half-lives: 4

Remaining counts = 80,000 / (2^4) = 80,000 / 16 = 5,000 countsSo, after 4 half-lives, you would expect to have 5,000 counts remaining.

Explanation:

The car will coast for approximately 2087 meters before starting to roll back down the slope.

To solve this problem, we need to find the distance the car will travel up the slope before coming to rest. This distance is equal to the distance the car will coast down the slope before starting to roll back.

We can use the conservation of energy principle to find the initial potential energy of the car, which will be converted to kinetic energy as the car coasts up the slope. At the point where the car comes to rest, all of the initial potential energy will have been converted to gravitational potential energy.

The initial potential energy of the car can be found using the formula:

PE = mgh

where m is the mass of the car, g is the acceleration due to gravity, and h is the height the car has traveled up the slope.

Since the car comes to rest at the top of the slope, all of the initial potential energy is converted to gravitational potential energy at this point. The gravitational potential energy can be found using the formula:

PE = mgh

where m is the mass of the car, g is the acceleration due to gravity, and h is the height the car has traveled up the slope.

Since the gravitational potential energy is equal to the initial potential energy, we can set the two formulas equal to each other:

\(mgh = 1/2 mv^2\)

where v is the final velocity of the car at the point where it comes to rest.

We can solve for h, the height the car has traveled up the slope:

\(h = 1/2 v^2/g\)

We can then use the formula for the distance traveled up the slope to find the distance the car will coast down the slope before starting to roll back:

d = h/sin(theta)

where theta is the angle of the slope.

Plugging in the values given in the problem, we get:

\(h = 1/2 (40 sin(6))^2 / 9.81 = 215.5 m\)

\(d = 215.5 / sin(6) = 2087 m\)

Therefore, the car will coast for approximately 2087 meters before starting to roll back down the slope.

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The distance it will coast before starting to roll back down is approximately 776.55 meters up the slope.

To solve this problem, we will use the concepts of kinetic energy, potential energy, and the conservation of mechanical energy. Initially, the car has kinetic energy (KE) due to its velocity (40 m/s) and no potential energy (PE) since we assume it starts at the bottom of the slope. When the car comes to a stop, all its kinetic energy is converted to potential energy.

First, we need to find the kinetic energy:
KE = (1/2) * m * v²
where m is the mass of the car and v is its velocity (40 m/s).

Next, we'll find the potential energy when the car comes to a stop:
PE = m * g * h
where g is the acceleration due to gravity (9.81 m/s²) and h is the height the car reaches on the slope.

Since the mechanical energy is conserved, KE = PE. We can set up the equation:
(1/2) * m * v² = m * g * h

The mass (m) can be canceled from both sides, leaving:
(1/2) * v² = g * h

Now we can find the height (h):
h = (1/2) * v² / g = (1/2) * (40 m/s)² / 9.81 m/s² ≈ 81.46 m

To find the distance the car traveled along the slope (d), we'll use the sine of the angle (6.0 degrees):
sin(6.0) = h / d

Solving for d:
d = h / sin(6.0) ≈ 81.46 m / sin(6.0) ≈ 776.55 m

The car will coast approximately 776.55 meters up the slope before starting to roll back down.

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Answer:

I would like to attach options to the question above for clarity.

Jasmine is investigating the effect force has on the motion of an object. She predicts if she puts a strong force on pushing a bowling ball, it will travel a farther distance than when a weak force is applied. Is her prediction correct?

A. No, a weak or a strong force applied to the ball is unable to affect the motion of the ball.

B. No, the force applied to the bowling ball should be a strong force.

C. Yes, the force applied to the bowling ball affects the motion of the ball.

D. Yes, the ball will travel a longer distance when a weak force is applied.

The correct option is C (Yes, the force applied to the bowling ball affects the motion of the ball).

Explanation:

First, a force is any effort either push or pull that causes an object to undergo a change.

A bowling ball can remain at rest or in motion except a force acts on it. This brings us to the question above, the mass which affects force is not mentioned which means it is uniform or negligible. Recall that force = mass X acceleration. So the greater the force that is applied to the bowling ball the further distance it will travel. From the question, she applied a forward force (pushing), so the more force she applies the further the bowling ball will travel.

Answer:

Alice Distance = 100 meters

Peter's Distance = 3 km

Alice Displacement and Peter's displacement are both 100 meters upwards.

Explanation:

To solve this question, we have to first define distance and displacement.

Distance is simply the measurement of the sum of all paths travelled from one point to another while displacement is measurement of the shortest distance from initial point to final point.

Now, Alice and Peter are moving from the same point.

Alice distance travelled is 100 meters.

Also, her displacement will be 100 meters because it is the shortest distance to the summit of the cliff.

Now, for Peter, he decides to take a longer route which is 3 km in distance.

However, the shortest path which is the displacement is still 100 meters.

Thus, Peter's displacement is 100 meters.

The floating substance will  displaces some liquid and so when the ice melts ,there will be no change in the water level as the melted ice will occupy the same volume as it was occupying earlier.

What is Archimedes’ law of buoyancy?

Archimedes’ principle can be defined as any body when completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward force. It is usually equal to the weight of the fluid displaced by the body.

Apparent weight= Weight of object (in the air) – Thrust force (buoyancy)

It is used in the design  of ships and submarines. Hydrometers are based on the principle of Archimedes.

Applications of Archimedes’ principle

The above case works on Archimedes principle leading to no change in water level.

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The thermometer measures the starting temperature as,

The temperature required for the boiling the water is

(a). The temperature requires to boil is,

Answer:

I once yelled out in zoom "I WANNA KISS A ANIME BOY" Cause of a silly dare

Explanation:

Everyone laughed and I was kicked

Answer:

my brother was pushing the cart at target and the front like got my ankles and I fell in front of everyone and he was just laughing.

Answer:

T try d add b CD c

Explanation:

Cdgffd

Answer:

The linear speed of the car is approximately 27.30 m/s

Explanation:

The question parameters are;

The mass of the person on the rollercoaster, m = 57.0 kg

The radius of the rollercoaster track, r = 42.7 m

The normal force felt by the person, F = 995 N

The centripetal force acting on the person keep the circular motion is given by the following equation;

\(Centripetal \, force \ F_c = \dfrac{m \times v^2}{r}\)

Where;

v = The linear velocity of motion = The linear speed of the car

The centrifugal force, F, is the force normal force felt by the person and is equal to the centripetal force, therefore, we have;

\(Centripetal \, force \ F_c = Centrifugal \, force \ F = \dfrac{m \times v^2}{r}\)

From which we have;

\(F = 995 = \dfrac{57 \times v^2}{42.7}\)

\(\therefore v = \sqrt{\dfrac{995 \times 42.7}{57} } \approx 745.38\)

The linear speed of the car = v ≈ 27.30 m/s

The angular speed of the car, ω = v/r ≈ 27.30/42.7 ≈ 0.639 rad/s

Answer: 18.1 m/s

Explanation:

Welding current is transferred from the electrode holder, through the electrode, and into the work. When it comes to welding, the electrode holder is a clamping device that keeps the electrode in place.

Welding current is transferred from the electrode holder, through the electrode, and into the work.What is a welding electrode holder.An electrode holder is an electrical device that keeps the electrode in place during welding. It's composed of insulated metal and has an opening on one end for holding the electrode. The electrode is positioned at the end of the holder, and the other end of the holder is attached to the welding cable.What are the uses of the welding electrode holder.The following are the benefits of welding electrode holders:It makes welding more efficientIt lowers the likelihood of electrode overheating and getting stuck.It aids in the creation of high-quality welds by keeping the electrode stable.

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Answer:

An anode is an electrode through which conventional current (positive charge) flows into the device from the external circuit, while a cathode is an electrode through which conventional current flows out of the device.

Explanation:

Answer:

You would notice it right away.

Explanation:

When you hear or see something, it is happening right at that  moment. It takes you less than a second to realize it.

The displacement of Susie is the total distance and direction she has traveled. In this case, Susie has traveled a total of 52 meters in a northwest direction.

Displacement is a vector quantity that is defined as the change in position of an object from its initial position. It measures the distance and direction of an object’s movement from its starting point to its final point. Displacement is a common concept used in physics and can be expressed mathematically as the difference between the initial and final position of an object.

To calculate her displacement, we can use the Pythagorean Theorem. Susie walked south for 12 meters, then east for 14 meters, then north 11 meters, then south 9 meters, then west 16 meters.

The Pythagorean Theorem states that the square of the hypotenuse (the total displacement) is equal to the sum of the squares of the other two sides:

Displacement^2 = 12^2 + 14^2 + 11^2 + 9^2 + 16^2
Displacement^2 = 1444
Displacement = 38.2 meters
To determine the direction of the displacement, we can use the arctangent function.
Arctan(Y/X) = Arctan(11/16)
Arctan(Y/X) = 28.02°
Since Susie started walking South, the total displacement is 28.02° Northwest.
Therefore, Susie's final displacement is 52 meters Northwest.

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Answer:

150 km

Explanation:

It has a maximum speed of 150 km/h, and it sails at half its top speed, so it sails at 75 km/h. If it remains constant for 2 hours, it will have gone 150km.

Answer:

A living factor in the environment refers to any living organism or species that play a role in the ecosystem and contributes to the balance of the natural environment. Examples of living factors in the environment include plants, animals, fungi, and microorganisms.

The electric fields is always directed from higher potential to the lower potential.

The electric fields always aiming from the region of higher potential to the region of lower potential. So the force of electrostatic and the direction of the travel of electrons will be always from lower potential to the region of higher potential.

An electric field is defined as the physical field which covers the electrically charged particles and also they can apply force on all other charged particles.

So we can conclude that the electric fields is always directed from higher potential to the lower potential.

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Answer:

3,240,000

Explanation:

72,000 times 45= 3,240,000

There is no rounded number unless u are dividing.

Answer:

1. Static friction = not moving

2.  sliding friction = moving

3. rolling friction = wheels

4. bumpy the surfaces are

5. how heavy the object is

6. it is easier to keep an object moving

7. static friction is GREATER than sliding friction

Explanation:

Radio sources are harder to find due to the effectively collect and focus the long-wavelength radio waves to achieve better resolution and sensitivity.

Compared to optical telescopes, radio telescopes are built large primarily because radio waves have very long wavelengths. Due to their long wavelengths, radio waves require larger telescopes to effectively collect and focus the incoming signals. This is necessary to achieve a sufficient level of resolution and sensitivity to detect and study radio sources, which can sometimes be harder to find than optical sources.
The size of a radio telescope is not mainly because they're less expensive to make than optical telescopes. While it is true that radio telescopes do not require the same level of precision and material quality as optical telescopes, building a large radio telescope can still be quite expensive.
Atmospheric turbulence is more of a problem for optical telescopes, as it can distort the incoming light and reduce the clarity of the observed image.

However, radio telescopes are less affected by atmospheric turbulence because radio waves can generally pass through the atmosphere with less distortion.
Lastly, while radio waves can be absorbed by certain parts of the atmosphere, especially at higher frequencies, this is not the primary reason for building larger radio telescopes.

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Answer:

Explanation:

like charges repel each other if one group of electrons has more mass it will push the other smaller mass of electrons away

The velocity of the combined weight at rest following the collision. 15 m/sec.

The amount of material that makes up every object and body is the simplest method for comprehending mass. Everything that we can see has mass. Examples of objects with mass include a desk, a seat, your mattress, a football, a glass, or even air. The mass of a thing determines whether it is light or heavy.

A measure of how much matter is present in or makes up a physical body. In classical mechanics, an object's mass is crucial to Newton's motion laws because it influences the force needed to accelerate it and, consequently, how much inertia it has.

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Power= 0.6521739130434783 Watts

Power is the amount of energy transferred or converted per unit time. The unit of power is watt, that is equal to one joule per second. Power is a scalar quantity.

Power = work/time,

P = w/t,

w = 15 joules

t = 23 seconds

P = 15/23

  = 0.6521739130434783 Watts

Work is measured in joules and Time is measured in seconds.

Therefore, power is 0.6521739130434783 Watts.

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Answer:

starting position: 3 m

velocity: 3 m/s

Explanation:

at t=0 position= 3 m

velocity: (delta)position/(delta)time

(delta=change in)

velocity= (15-3)/(4-0)

velocity= 12/4

velocity= 3 m/s

Answer:

If one were to use 5 billion years as the age of the universe and 75 years as the average human life span then

T = 75 / 5 E9 = 1.5E-8

The number of seconds in a year is 3600 * 24 * 365 = 3.2E7

If t = N * T   seconds in a year * fraction of human life span

t = 1.5E-8 * 3.2E7 = .48

A human life span is about 1/2 second compared to the life of the universe if the universe were compressed to a single year

Answer:

Explanation:

I hope this was all you wanted. Everything else seems finished correctly.