As a ball falls, does the potential energy go up or down?

If element X has 96 protons, how many electrons does it have

An object moving with a speed of 35 meters per second has a kinetic energy of 1500 joules. What is the mass of the object?

Charges can be separated in an isolated system

Circle the letter of the sentence that explains why no machine is 100% efficient. A. Electrical energy is transformed to mechanical energy by fuel. B. Mechanical energy is transformed to thermal energy by friction. C.

Which of the following correctly describes the first animals that appeared? A.) these were large creatures, similar to dinosaurs B.) these were bony creatures that lived only in wet environments C.) these were soft and boneless creatures D.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?

A wave has a wave length of 2 m and a frequency of 500 Hz, what is its speed?

Can anything block a magnet's force feild?