If a heat engine pulls 4390.0 J of heat from the hot reservoir and exhausts 3582.2 J of heat to the cold reservoir, what was the work done by the engine? What is the efficiency of this engine in percent? (do not enter the percent sign)

Does electricity travel at the speed of light?

What is a fluid ability to excert an upward force on an object

Radio telescopes detect waves with a wavelength of roughly 10 m. True False

A rocket accelerates by burning its onboard fuel, so its mass decreases with time. Suppose the initial mass of the rocket at liftoff (including its fuel) is m, the fuel is consumed at rate r, and the exhaust gases are ejected with constant velocity

Select all that apply. The world's population is: evenly distributed growing quickly concentrated in a few areas putting pressure on resources and space expected to shrink by 2050

Electronic signals that pulse current in a series of ones and zeros are known as

If there is a big mass, it would need a stronger force to accelerate it. Which law does this describe?

List 3 quantities of waves.

Bailey is on the tenth frame of her recent bowling competition and she needs to pick up the last pin for a spare and the first place trophy. She rolls the 7.05-kg ball down the lane and it hits the 1.53-kg pin head on. the ball was moving at 8.

Which of the following is a conservative force? 1. force due to friction 2. force due to gravity 3. both (1) and (2) 4. neither (1) nor (2)