A racecar burns gasoline to power its engine. As the car is racing around a track, what energy is involved in the system? Check all that apply.

- mechanical energy

- chemical energy

- thermal energy

- electromagnetic energy

Is there gravity in space. True False

You exert 375 J to move a 45-kg object 5 m. How much force is required?

Which term describes how quickly a car is slowing down to a stop? Which term describes your location relative to your home? Which term describes how fast and in which direction you are traveling?

What are fossil fuels

A responder can protect himself/herself from radiation by using shielding as a response action. What materials are best for protecting against beta particles?

John heats 1 kg of soup from 25 °C to 70 °C for 15 minutes by a heater. How long does the same heater take to heat 1.5 kg of the same kind of soup from 20 °C to 80 °C? The energy output per unit time by the heater is constant.

What is a light-year equal to? A. the distance light travels in one year B. the time it takes light to travel 10 trillion kilometers C. the mean distance between the Sun and the center of our galaxy D.

You have just installed a new sound card in your system, and Windows says the card installed with no errors. When you plug up the speakers and try to play a music CD, you hear no sound. What is the first thing you should do? The second thing? a.

Why does convection occur only in fluids?

The force of repulsion between two like-charged particles will increase if