For the following calculation, ignore air resistance Do not round your answer. Write the answer exactly as it is. An object falls from rest and strikes the ground 19 seconds later. The object's initial height was __ meters.

A 50 g bullet is fired into a 2 kg ballistic gel at rest on a frictionless surface. The bullet embeds itself in the gel and begins moving at 3.5 m/s. What was the initial velocity of the bullet?

Which of the following is contact force a) magnetic force b) friction c) gravity d electrical force

The RMS potential difference of an AC household outlet is 117 V. a) What is the maximum potential difference across a lamp connected to the outlet? b) If the RMS current through the lamp is 5.5 A, what is the lam

How do you calculate elecrical power?

How is an estuary different from a lake

Mass m1 is has an initial velocity v1i. Mass m1 collides with a stationary mass m2. The net external force on the two particle system is zero. If the two masses stick together after the collision, then the final speed vf of the two masses is:

What can one say for sure about element #99, Einsteinium (Es)) ? a) There's no such element! b) It is an alkali metal. c) It is radioactive. d) It has 253 neutrons. e) It increases one's 1. Q. slightly when swallowed.

What is the pH of neutral substance?

The velocity of a wave depends only upon the ... ?

When studying atoms, scientists can ignore the blank force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom