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?

F two waves with equal amplitudes and wavelengths travel through a medium in such a way that a particular particle of the medium is at the crest of one wave and at the trough of the other wave at the same time, what will happen to that particle? A.

The Sun is to a planet as - A. Earth is to the Moon. B. the tides are to the Sun. C. a moth is to a flame. D. the seasons are to the Moon.

A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. The student reports hearing two successive resonances at 53.95 Hz and 59.00 Hz. (Assume that the speed of sound in air is 343 m/s.

Which of the following occurs when the strength of the current flowing through a wire is increased? A. the direction of the field changesB. the magnetic force is createdC. the magnetic field is increasedD. the magnetic field is decreased

The force that keeps a satellite in earth's orbit is always directed away from the center of earth. true or false.

What is most likely the relationship between Mendel's rules of genetics and Darwin's idea of biological evolution? Mendel's genetics states laws that are now part of the theory of biological evolution.

Why would it be a problem if your household appliances were connected in a series circuit

An object with a mass of 100 g is in free fall. What is the speed of the object after it has fallen for 4 seconds? A. 39 m/s B. 9.8 m/s C. 25 m/s D. 96 m/s

How was the water filtered to remove debris and living organisms?

What causes physical vibrations in transformers at twice the frequency of the AC power involved.