Wich of the following is a contact force?

a. - friction

b.-magnetism

c.-gravity

d.-electricity

A ball is thrown up into the air with an initial velocity of 64 ft/sec. The ball is 4 ft above the ground when it is released. Its height, in feet, at time t seconds is given by: h (t) = - 16t^2 + 64t + 4.

A talented PHY210 student is tuning her car. She increase the engine speed from 660 rpm very (69.1 rad/s) to 4500 rpm (471 rad/s). If the flywheel has a moment of inertia of 0.

Three liquids that will not mix are poured into a cylindrical container. The volumes and densities of the liquids are 0.574 L, 2.50 g/cm3; 0.445 L, 1.04 g/cm3; and 0.498 L, 0.659 g/cm3.

What would happen if you touched the knob of a positively charged electroscope with a negatively charged object

I blow up a balloon, tie it off, and take it to the bottom of the swimming pool. What will happen to the balloon and the air inside it

What is the main optical element of a refracting telescope?

Two water manometers are connected to a tank of air. One leg of the manometer is open to 100kPa pressure (absolute) while the other leg is subjected to 90kPa. Find the difference in deflection between both manometers, Delta h_a - Delta h_b.

Most geologists believe that the dinosaurs became extinct 65 million years ago when a large comet or asteroid struck the earth, throwing up so much dust that the sun was blocked out for a period of many months. A.

If you drop a silver dollar off a building and it hits the ground in 10 seconds, how fast was the coin going just before it hit?

What is the weight of an with a mass of 32kg