Which of the following has the most potential energy?

A. A car at the top of the hill

B. A Car speeding down a hill

C. A person at the top of the hill

The Wizard of Oz is trying to make a quick escape in his hot air balloon. If the net force on the balloon remains constant, what happens as he throws sand bags out of the balloon's basket? A. The mass of the balloon increases. B.

What is the energy in electron-volts (eV) of a photon of green light that has a wavelength of 520 nm? (1.0 m = 1.0 * 10^-9m) 3.8 * 10^-19eV 3.4 * 10^-40eV 2.4eV 2.2 * 10^-21eV

If you increase the mass of an object, but keep the force on it constant, its acceleration decreases?

True or False? The molecules in a solid have * more * thermal energy than the molecules in a gas?

A satellite dish is shaped like a paraboloid of revolution. This means that it can be formed by rotating a parabola around its axis of symmetry. The receiver is to be located at the focus.

which of the following objects is considered negatively charged A - one with excess electrons on the surface B - one with excess neutrons on the inside C - one with excess protons on the inside D - one with excess protons on the surface

In general, how do the densities of a material in solid and liquid form compare?

Alana summarized what happens when a ball sitting on top of a grassy hill rolls down the hill. The motionless ball has potential energy. Once the ball starts to roll down the hill, new kinetic energy is made.

What unit is commonly used when measuring the energy rating of an electrical appliance

Adding bleach to red food coloring causes the food coloring to lose its color it this physical or chemical change? Explain