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Answer:

it has most potential at highest point (not in space), But kinetic at lowest

Answer: When the ball is highest in the air it has the most potential energy and it has the most kinetic energy when it is about to hit the ground thats when it is moving fastest.

Answer: (C) +1

Explanation:

Neutrons have no charge, so we can ignore them in this problem. Protons have a 1+ charge, and electrons have a 1- charge. So, the total charge is 10(+1) + 9(-1) = +1.

Answer:

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.

Explanation:

El movimiento rectilíneo uniforme (MRU) es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante.

La distancia recorrida,  x , por un móvil que tiene un MRU con un velocidad  v  durante el intervalo de tiempo  t  es:

x= x0 + v*t

donde x0 es la posición inicial.

En este caso:

Reemplazando:

x= 22 m + 5 m/s* 30 s

Resolviendo:

x= 22 m + 150 m

x= 172 m

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.

Answer: 12.44 millisecond

Explanation:

Based on the information given, to know the time taken for the impulse, which travels a distance of 1.58m to reach the brain will be:

Time taken = Distance/Speed

Time taken = 1.58/127

Time taken = 0.01244

Time taken = 12.44 millisecond.

Answer:

For small angles (✓ < 30 degrees), the period of a simple pendulum4can be approximated by: 3A radian is an angle measure based upon the circumference of a circle C =2⇡r where r is the radius of the circle. A complete circle (360 ) is said to have 2⇡ radians. Therefore, a 1/4 circle (90 )is⇡/2 radians.

Explanation:

Answer:

300 ohm

Explanation:

Trust me

The speed of sound wave in water is much more greater than its speed in air, so when the sound wave passes from sea water to air, then it's speed decreases.

Answer:

1. :uniformly accelerated motion

2. .0m/s

1. ( b ) ==》 uniform motion

_____________________

2. ( a ) ==》 0 m/s

Answer:

Explanation:

When the swing moves from the lowest point up to either peak, the main force acting is momentum; and when the swing falls from either peak to its lowest point, the main force acting is gravity. If you do not pump your legs fast enough, air resistance along with gravity will keep you down.

Answer:

Explanation:Frequency

Answer:

0.45 m/s

Explanation:

You habe already the formula, what's wrong then? it's simple

A = F/M

A = 2400/800

A = 24/8

A = 3 m/s²

Answer:

Explanation:

A force is a push or pull upon an object resulting from the object's interaction with another object.

Whenever there is an interaction between two objects, there is a force upon each of the objects.

Answer:

There are no forces acting on the rock :)

Explanation:

There are no forces acting on the rock.

What is Newton's 1st law of motion ?

A body in motion will remains in motion and a body at rest remains at rest until any external force is applied on it.

Here, the rock remains on sidewalk as the weight is rock is balance by the reaction force acting by the sidewalk and there is no external force acting in parallel direction to the rock to have motion according to Newton's 1st law of motion.

Therefore, no forces acting on the rock.

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Answer:

Explanation:

The mass of the football player can be found by using the formula

[tex]m = \frac{w}{a} \\ [/tex]

w is the weight

a is the acceleration due to gravity

From the question we have

[tex]m = \frac{680}{9.8} \\ = 69.38775...[/tex]

We have the final answer as

Hope this helps you

Answer:

(a) What is her weight on earth? (b) What are her mass and her weight on the moon, where g = 1.62 ms–2? Solution: (a) On earth. W = m g = 55.0 x 9.8 = 539 N.

Explanation:

im not sure

Let the numbers be 8x and 5x

ATQ,

= 8x + 6/5x + 6 = 3/2

= 2(8x + 6) = 3(5x + 6)

= 16x + 12 = 15x + 18

= 16x - 15x = 18 - 12

= x = 6

Now, the numbers are:

answer

it's unreliable

Answer:

  (a)  It can be replenished as it is used.

Explanation:

A resource is "renewable" if using it does not diminish the supply. Solar power and wind power are supplied by the Sun. The use of solar power and/or wind power does not change the capacity of the sun to provide that power.

A renewable resource is one that can be replenished as it is used.

_____

Additional comment

For all resources, there is a finite supply available on Earth. The sun supplies about 1 kW per square meter. Using some of that for human purposes changes the amount or form available for other purposes—photosynthesis, weather, ocean currents, reflection back to space, and so on. Within the time scale of human existence, the supply is essentially non-diminishing. With large-scale use, planet-wide effects can be expected.

To cause both charges to have the same change in electric potential energy, the negative charge should be moved towards the positive plate, as electric potential decreases in the direction of electric field lines. Therefore, the correct option is to move 0.04 m toward the positive plate.

Electric potential energy is the energy an electric charge possesses due to its position relative to other electric charges in an electric field. The electric potential energy of a charge depends on its charge, the strength of the electric field, and the distance between the charges.

Negative and positive plates are typically used to refer to the electrodes in a capacitor. A capacitor is an electronic component that stores electric charge and energy in an electric field. In a capacitor, the positive plate is typically connected to the positive terminal of a power supply, while the negative plate is connected to the negative terminal.

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Answer:

Power is calculated by multiplying voltage by current.

Explanation:

If you're calculating the power of an athlete who is lifting weights,

or the power of a windmill that is pumping water from a well, or

the power of two horses turning millstones, then those electrical

units won't help at all.

But if you happen to be calculating the power delivered to an

electrical circuit or dissipated by an electrical device, then you

can use ...

               (voltage) times (current)

or

               (voltage)² divided by (resistance)

or

               (current)² times (resistance) .

The choice just depends on which quantities you know

or can easily measure.  

Answer:

Explanation:

Thomas Young (1773 − 1829) first introduced the word “energy” to the field of physics in 1800, but the word did not gain popularity. Thomas Young later established the wave nature of light through interference experiments.

Answer:

June 1849 - James Prescott Joule

Explanation:

James Joule is the physicist who discovered the relationship between the loss of mechanical energy and the gain of heat. If an object contains mechanical energy, then it has the ability to do work.

Answer:

D

Explanation:

im guessing here i hope it is correct and good luck

It is Chemical Energy, actually

Answer:

B. -2

Explanation:

The total charge on an atom is the sum of all individual charges present in it. Therefore, the total charge on this atom is given by the following formula:

[tex]q = (n_p)(q_p)+(n_e)(q_e)+(n_n)(q_n)[/tex]

where,

q = total charge on atom = ?

[tex]n_p[/tex] = no. of protons in the atom = 15

[tex]n_e[/tex] = no. of electrons in the atom = 17

[tex]n_n[/tex] = no. of neutrons in the atom = 12

[tex]q_p[/tex] = charge on proton = +1

[tex]q_e[/tex] = charge on electron = -1

[tex]q_n[/tex] = charge on neutron = 0

Therefore,

[tex]q = (15)(1)+(17)(-1)+(12)(0)\\q=-2[/tex]

Hence the correct option is:

B. -2

Answer:

2.66 m/s to the right

Explanation:

Applying,

The Law of conservation of momentum,

For elastic collision,

mu+m'u' = mv+m'v'................. Equation 1

Where m = mass of Car A, m' = mass of car B, u = initial velocity of car A, u' = Initial velocity of car B, v = Final velocity of car A, v' = Final velocity of car B

make v the subject of the equation

v = (mu+m'u'-m'v')/m.................. Euqation 2

Note: Assuming Left direction is positive and right direction is negative.

Given: m = 67.3 kg, m' = 65.2 kg, u = 5.65 m/s, u' = -3.2 m/s, v' = 5.38 m/s

Substitute these values into equation 2

v = [(67.3×5.65)+(65.2×[-3.2])-(65.2×5.38)]/67.3

v = (380.245-208.64-350.776)/67.3

v = -179.17/67.3

v = -2.66

Hence v = 2.66 m/s to the right

The  slope of the hill on which the skier is accelerating is 24⁰.

The given parameters;

The acceleration  of the skier is calculated as follows;

[tex]a = \frac{v}{t} \\\\a = \frac{12}{3} = 4 \ ms^2[/tex]

The net force on the skier is calculated as;

[tex]mgsin\theta - \mu_kF_n = ma\\\\mgsin\theta- 0 = ma\\\\gsin\theta = a\\\\sin\theta = \frac{a}{g} \\\\\theta = sin^{-1} (\frac{a}{g} )\\\\\theta = sin^{-1} (\frac{4}{9.8} )\\\\\theta = 24 \ ^0[/tex]

Thus, the  slope of the hill on which the skier is accelerating is 24⁰.

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Answer:

Reversibility principle of exercise

Explanation:

Kendra went on vacation for a week, meaning she stopped exercise for a week, and due to this, her body readjusts to what is demanded (rest) making her unable to run as far as she could before when she resumed training. It is now clear she has lost some of her physical skills and this effect is mostly seen when sprinters mostly lose their muscular endurance before losing other skills when they stop training for some days/weeks/months, and this is an example of the reversibility principle of exercise.

Answer:

C

Explanation: good luck

Answer:

In one rotation, the large wheel turns 4m.

Explanation:

The given values are:

Input distance,

= 0.64 m

Mechanical advantage,

= 0.16

As we know,

⇒ [tex]Out. \ Distance = \frac{Inp. \ distance}{Mechanical \ advantage}[/tex]

On putting the values, we get

⇒                         [tex]=\frac{0.64}{0.16}[/tex]

⇒                         [tex]=4 \ m[/tex]

Answer:

If you are going someplace, you might want to tell which way you were going and how fast for traffic.

Explanation: