Which of the following best defines insulator?

a substance with high conductivity

a substance that easily transfers heat

a substance with low ability or no ability to conduct energy

a substance that moves heat from one place to another

An object is traveling with a constant velocity of 2.0 m/s. How far will it have gone after 38 s?

A ramp is used to load furniture onto a moving truck. The person does 1240 J of work pushing the furniture up the ramp, and the ramp does 822 J of work. Calculate the efficiency of the ramp.

Suppose you were to play a trumpet after breathing helium, in which the speed of sound is much greater than in air.

Put the energy values in order from smallest at the top of your list to biggest at the bottom. 20 J 2 J 100 J 2 kJ 20,000 J 100 kJ

Astronomy has emerged as a science in the past two hundred years. true false

Your family is moving to a new house. While lifting the box 1.5 m straight up you exerted a force of 200 N for 1 second. How much work is required?

Which best describes oil and water

Both the electrical force and the gravitational force between two objects share which relationship? They are directly proportional to mass. They are inversely proportional to the square of the distance. They are inversely proportional to charge.

During a baseball game, a player hits a a ball with a speed of 43m/s at an angle of 25∘ above the horizontal. When the player hit the ball, it was 1m above the ground, and after the hit, the ball flies straight toward the center field fence.

How does the electric potential energy change as the electron moves from i to f?