You drop a rock off the top of a 100m tall building. How long does it take to hit the ground?

A cannonball is fired on flat ground at 420 m/s at a 53.0° angle. What maximum height does it reach?

if one of the classic nuclear physics experiments at the beginning of the 20th century an alpha particle was accelerated toward a gold nucleus and its path was substantially deflected by the coulomb interaction if the energy of the doubly charged

Two small objects each with a net charge of + q exert a force of magnitude f on each other: we replace one of the objects with another whose net charge is + 4q: the original magnitude of the force on the + q charge was f;

Each element is made up only one kind of

Which property of light remains unchanged when it enters a different medium? A amplitude B frequency C wavelength D velocity E density

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates

A body has translatory motion if it moves along a

What is Nothing. (sorry i have been wondering this for a very long time)

What is the weight of a 15kg dog on earth?

Identify the scenario below as to whether they increase, decrease, or not change the frequency in which a string vibrates and thus change its pitch. Assume that no other changes are happening. 1. Tightening a string for greater tension 2.