Did Kepler propose the modern model of the solar system?

A small plastic sphere with a charge of - 7.5 nC is near another small plastic sphere with a charge of + 11 nC. If the force between the spheres has a magnitude of 8.8*104 N, what is the distance between the spheres? What kind of force is this?

It is relatively easy to strip the outer electrons from a heavy atom like that of uranium (which then becomes a uranium ion), but it is very difficult to remove the inner electrons. Discuss why this is so.

What is the momentum of a 0.15 kilgram baseball moving at 20 m/s?

During a vaporization a substance changes from what to what

Which of the following is not considered a behavior? A. eating B. heart beating C. sleeping D. crying . .

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to drop? A. The molecules in the water spread apart. B. The molecules in the thermometer's liquid spread apart. C.

The amount of energy carried by a wave is proportional to the square of the wave's A. frequency B. amplitude C. wavelength D. period ... ?

The pressure at the bottom of a jug filled with water does not depend on

at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 degrees?

A record player turntable initially rotating at 3313 rev/min is braked to a stop at a constant rotational acceleration. The turntable has a rotational inertia of 0.031kg? m2.