A student read that putting an extra 5 psi (pounds per square inch) of air into car tires helps it burn less fuel, so she decides to test this idea. She brings her car to a race track, fills the gas tank, and drives 100 miles. She then measures how much fuel she
burned. She then adds another 5 psi of air to the tires, drives another 100
miles, and measures the fuel burned. She then compares the results.
What is the controlled variable:
1. The weather conditions during each test of 100 miles
2. The speed the car is driven on
3. The race track that the car is driven on
4. All of the above
Explain:
Answers: 2
Physics, 22.06.2019 02:30, dxpebetty64
Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.
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Physics, 22.06.2019 05:00, caguil00
Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.
Answers: 1
A student read that putting an extra 5 psi (pounds per square inch) of air into car tires helps it b...
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