a ball is thrown horizontally from the roof of a building 45.0 m tall and lands 24.0 m from the base. What was the ball's initial speed?

True or False : When rocks undergo metamorphism, they always change chemically

100kg quarterback is travelling at 3m/s and is stopped by a tackler in 2s. a. calculate the average force exerted by the tackler?

There are two main types of wave, transverse and longitudinal. Which type are sound waves?

In a chemical equation, where do the reactants appear?

Assume that you can drive at a constant speed of 100 kilometers per hour. suppose you started driving from the sun. how long would it take, in years, to reach earth?

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

The hinge at A and cable BDC support beam ABC. Cable BDC passes over the pulley D that is pinned to the ceiling. (Assume that the + x-axis is to the right and the + y-axis is up along the page.

The "zone of avoidance" a) Accounts for the absence of any planet between the orbits of Mars and Jupiter Prevents collisions between planets in the Solar System.

Electric current is ...