What happens to mechanical energy if the potential energy of an object decreases?

A. Mechanical energy decreases. B. Mechanical energy increases.

C. Mechanical energy increases and then decreases. D. Mechanical energy remains unchanged.

A sound wave is moving with a frequency of 700 Hz. What is the period of this sound wave? 1/700 Hz 70 s 700 s 1/700 s

On Earth, the gravitational field strength is 10 N/kg. Calculate Ep for a 4 kg bowling ball have that is being held 2 m above the ground.

If the current is increased what will happen to resistance?

How does acceleration affect your average speed?

A 3-ft-diameter duct is used to carry ventilating air into a vehicular tunnel at a rate of 9000 ft3/min. Tests show that the pressure drop is 1.5 in. of water per 1500 ft of duct.

The transverse wave shown has a wavelength of 1.5 m and is traveling in the x-direction. How long does it take the wave to travel 6.0 m in the x-direction? 0.13 seconds 0.67 seconds 2.0 seconds 8.0 seconds

Why can scientists ignore the gravitational force when studying the physics of an atom?

Gravity is not considered matter True or false

The effort is always less than the load for a second-class lever. true or false

A student is preparing to bake a cake at home and places several ingredients on the countertop to use. First he preheats the oven to 175C, then mixes all of the ingredients together. He pours all of the cake batter into 2 pans and bakes for 1 hour.