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which statement is true? pls explain how u know.

select one:
a. geothermal power is generated from moving water.
b. oil, a renewable resource, is processed to make jet fuel.
c. wind power can turn turbines to generate electrical power.
d. propane, a renewable resource, is used in some heating systems

What happens to the velocity of the car when the upward pull of the cable is greater than the downward pull of gravity as the car rises toward the top?

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon