At which point(s) does the ball have 25% potential energy and 75% kinetic energy?*

Answer: true

Plz mark brainliest:)

Answer:

A. Fog forms in a valley

Answer:

The first choice (32m/s) is the closest to the answer

Explanation:

The magnitude of a vector is the distance between the initial and the end point of the vector.

Being Vx and Vy the horizontal and vertical components of the vector V respectively, the magnitude of V is calculated as:

[tex]\mid \vec{V} \mid =\sqrt{V_x^2+V_y^2}[/tex]

The components of the velocity of the physics student's projectile launcher are Vx=28 m/s and Vy=15 m/s.

Calculate the magnitude of the velocity:

[tex]\mid \vec{V} \mid =\sqrt{28^2+15^2}[/tex]

[tex]\mid \vec{V} \mid =\sqrt{784+225}[/tex]

[tex]\mid \vec{V} \mid =\sqrt{1009}[/tex]

[tex]\mid \vec{V} \mid =31.8 \ m/s[/tex]

The first choice (32m/s) is the closest to the answer

Answer:

maybe the sign says something mean

Explanation:

Answer:

a vacuum formed above the column of mercury in a mercury barometer.

Answer:

An air-free space above the free surface of a liquid in a vessel that is closed above the liquid

Answer:

Rating of percieved exertion

Answer:

The answer is C

Explanation:

The same amount of force is applied to both the wall and the rope

When the frequency of the wave is doubled the energy that is transferred to the wall will be doubled.

Frequency is defined as the number of repetitions of a wave occurring waves in 1 second.

Bill is making waves on a rope with one end attached to a wall. When he starts moving the rope quickly, the frequency of the waves created on the rope doubles.

The energy that is transferred to the wall is propotional to the frequency of the waves.

Hence the energy that is transferred to the wall will be doubled.

To learn more about the frequency reference the link;

https://brainly.com/question/14926605

Answer:the moon, earth, phobos,and jupiter

Explanation:i hope im right

Answer:

wavelength

Explanation:

the definition of wavelength is the distance from one Crest to the next crest,or one trough to the next trough

The phenomenon that refers to the distance between two crests or two troughs on a transverse wave is wavelength.

Wavelength is simply defined as the distance between successive crests of a wave, particularly in a sound.

In conclusion, wavelength refers to a traveling particle.

Read more about Wave

https://brainly.com/question/3004869

Answer:

The temperature at which a liquid boils and turns to vapor.

Explanation:

Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. therefore the water is at its boiling point.

Answer:

When a substance starts to boil, like 212° F, that is considered boiling point.

Answer:

Rahul is wrong.

Explanation:

From Newton's universal law of gravitation, we know that the force of attraction between two falling body masses is directly proportional to product of masses of two bodies and has an inverse proportional relation with the square of the distance between the masses.

If the 2 masses are M1 & M2, while distance between them is d, this can be written as;

F ∝ M1•M2

And F ∝ 1/d²

We also know that the acceleration due to gravity is given as;

g = GM/r²

Where;

M is the mass of earth

r is the radius of earth

From the above 3 formulas, we can deduce that the value of the acceleration due to gravity(g) is independent of the 2 masses of the falling body as it depends on only the mass of the earth and radius of the earth.

This means that the acceleration due to gravity will be the same whether the bricks are doubled or whether it remains single.

Thus, they will fall with same velocity in each case. So Rahul is wrong.

​

d) ≈ 0.87 m/s²

Hi there !

F = m×a => a = F/m

a = 59N/68kg

1 N = 1kg·m/s²

= (59kg·m/s²)/68kg

= 0.8676 m/s²

≈ 0.87 m/s²

Good luck !

Answer:

d) The trampoline pushes back up on the gymnast.

Explanation:

According to Newton's third law of motion; for every action force, there is an equal and opposite reaction force. The action force and reaction force are reciprocal to one another i.e. they act oppositely to one another. The reaction force acts in an opposite direction to the action force and vice versa.

In this question, a gymnast pushed down on a trampoline during a routine. This is called the ACTION FORCE. In conformity to Newton's third law, the trampoline pushes back up on the gymnast. This opposite force is called the REACTION FORCE.

Answer:

D) the trampoline pushes back up they gymnast

Explanation:

Answer:

0.00583 seconds

Explanation:

Answer:

bada bop boop pow

Explanation:

Answer:

It will roll up to its initial height from which it rolled from on the first hill

Explanation:

The given information are;

The height from which the ball is rolled = 3 feet[

The equation of the potential energy of the ball as it rolled down the frictionless inclined plane is given by the following equation;

m × g × h₁ = 1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r]

Where;

m = The mass of the ball

h = The from which the ball is rolled down

v = The velocity of the ball

r = The radius of the ball

Therefore, all the potential energy, m × g × h, is converted into kinetic energy when the ball reached the ground

Similarly, as the ball rolls up on the other side, by the principle of energy conservation, all the kinetic energy is transformed into potential energy as follows

1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r] = m × g × h₂, therefore, we have;

1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r] = m × g × h₁ =  m × g × h₂

Therefore since m × g × h₁ =  m × g × h₂, then h₁ = h₂, the ball rises to the same height it started rolling from on the first hill.

Answer:

The time taken before the axe hits the ground is 0.385 s.

Explanation:

Given;

initial velocity, u = 50 m/s

height above ground, h = 20 m

To determine the time taken before the axe hits the ground, apply the following kinematic equation;

h = ut + ¹/₂gt²

20 = 50t + ¹/₂(9.8)t²

20 = 50t + 4.9t²

4.9t² + 50t - 20 = 0

Solve this quadratic equation;

a = 4.9, b = 50, c = -20

t = 0.385 s

Therefore, the time taken before the axe hits the ground is 0.385 s.

Answer:

False.

Explanation:

All atoms of the same element have the same number of protons, but some may have different numbers of neutrons.

Answer:

C.) Calculate the average amount of salt that dissolves to summarize findings

Explanation:

Just telling you, nobody reads these things. They just look at the answer and say oh i got it right now but you should bc i got a 50 on this quiz and this was one of them that was right so believe me when i say, i got this question right. UwU <333333333

Answer:

Calculate the average amount of salt that dissolves to summarize finding

-The third choice/ C-

Have a good day :)

Answer:

300,000

Explanation:

They try not to influence the subjects

Explanation:

Answer:

100...................

Answer:

Neutrons have no charge

Explanation:

Answer:

Neutrons don't have a charge....

Explanation:

Hope this helped!!!

Answer:

You build up kinetic energy and you get shocked this happens because static has built up from the socks and the rug. This also happens when you rub a balloon on your head or shuffle across a trampoline with socks on.

Explanation:

brainliest plz

Answer:

Yes

Explanation:

The given parameters are;

The speed with which the fastball is hit, u = 49.1 m/s (109.9 mph)

The angle in which the fastball is hit, θ = 22°

The distance of the field = 96 m (315 ft)

The range of the projectile motion of the fastball is given by the following formula

[tex]Range = \dfrac{u^2 \times sin(2\cdot \theta)}{g}[/tex]

Where;

g = The acceleration due to gravity = 9.81 m/s², we have;

[tex]Range = \dfrac{49.1^2 \times sin(2\times22^{\circ})}{9.81} \approx 170.71 \ m[/tex]

Yes, given that the ball's range is larger than the extent of the field, the batter is able to safely reach home.

Answer: 2.5 m

Explanation: 1/2(1s)(5m/s)

=2.5.

Got it from Khan Academy

Answer:

The answer is Both types of government work well in countries with large populations.

Explanation:

Answer:

its d

Explanation:

Answer:

75m

Explanation:

Given parameters:

Distance covered by the boat = 15m

Time taken = 8s

Unknown:

Distance covered by the boat in 40s  = ?

Solution:

To solve this problem, we need to find the speed of the boat first;

    Speed = [tex]\frac{distance}{time}[/tex]

Insert the parameters and solve;

    Speed  =[tex]\frac{15}{8}[/tex] m/s

Now;

The boat will travel;    

    Distance  = speed x time

    Distance =   [tex]\frac{15}{8}[/tex]  x 40  = 75m