________ is the ability to do work.
A. Force
B. Joules
C. Power
D. Energy

Answers

Answer 1

Answer: energy is the ability to do work so a

Answer 2

Answer: D is the answer, because you use your energy and that makes you capable to do work

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I am in summer school for physics and I got this question for home work. A rock climber of mass 55 kg is hanging suspended from a rope tied to another climber of mass 65 kg on a horizontal cliff ledge. If the coefficient of kinetic friction between the climber on the ledge and the ledge 0.45, what is the net acceleration of the climber on the ledge? I have been stuck on this question for 2 hours and I need it for tomorrow can anyone help me. Thanks

The reason why the position of an electron cannot be measured with absolute precision is:

Answers

They are too small are never in the same place. Electrons are constantly moving in random motion within the electron cloud, making them impossible to follow.

Describe the difference between the currents that exist in the wires leading to a capacitor when these wires are connected to (a) a DC source and (b) an AC source.

Answers

Answer:

Explanation: In DC circuit, the current will flow for a short time, which is required to charge the capacitor. Once you switch it on, it spikes and the gradually decreases to almost zero (0) as the capacitor becomes fully charged.

In an AC circuit, the circuit acts as if the current is flowing throw the plates whereas is not actually flowing. The circuit acts like the AC is flowing through the capacitor.

A golf club with 65J of kinetic energy strikes a stationary golf ball with a mass of 46g. The energy transfer is only 20% efficient. Calculate the initial speed of the golf ball

Answers

The initial velocity of the ball is v = 23.8 m/s

How to find the initial speed?

We know that kinetic energy is given by:

KE = m*v²/2

Where m is the mass in kg, and we know that the energy transfer is 20% of the intial 65J, then we can write:

0.2*65 = (0.046)*v²/2

Solving this equation for v, the velocity, we get:

v = √[0.2*65*2/0.046]

v = 23.8 m/s

Learn more about kinetic energy:

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kinetic energy of golf club = 65J,
kinetic energy supplied to golf ball = 20% of 65 = 0.2 * 65 = 13J,
kinetic energy of ball = [mass * Velocity²]/2,
mass = 46gm = 0.046Kg,
[0.046 * V²]/2 = 13, or 0.046 *V² = 26,
V² = 26/0.046 = 565.22,
V = 23.77 m/sec = initial velocity of golf ball after hitting.

When is acceleration the greatest on a graph

Answers

Depends on the graph, but the answer is likely the slope. The greater the slope, the greater the change in whatever is being graphed. In this case velocity vs time.

An object traveling in a straight line accelerates. What will definitely happen due to the acceleration?The distance traveled in a certain time will increase.
The displacement covered in a certain time will decrease.
The speed of the object will stay constant.
The velocity of the object will change.

Answers

"Acceleration" means any change in the speed or direction of motion ... speeding up, slowing down, or turning. So . . .

-- The distance traveled in a certain time may increase or decrease.

-- The displacement covered in a certain time may increase or decrease.

-- The speed of the object may increase or decrease.

-- The velocity of the object (speed/direction) will change.

What is air pressure?