Avolleyball player hit the ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s2. how much force did the volleyball player apply to the ball?

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton