Which of the following must be true of a person who shares the same reference frame as you?

a) the person must be sitting right next to you

b) the person must be the same size as you

c) the person must not be moving relative to you.

What is the frequency of microwaves with wavelength of 20-mm? (c = 3.0 x 10^8 m/s) a. 15 GHz b. 100 MHz c. 400 MHz d. 73 GHz

The atomic number of an element is determined by the number of A. electrons. B. protons. C. protons and neutrons. D. neutrons.

An electric fan spinning with an angular speed of 13 rad/s has a kinetic energy of 4.6 j. what is the moment of inertia of the fan?

Why does interacting in sexual intercourse feel so good?

How long does it take for light from a star that is 8 light-years away to reach earth? A. 8 earth minutes B. 16 earth minutes C. 8 earth years D. 16 earth years

What will happen to an electromagnet of the electric current is lost?

How can velocity be used to calculate for an unknown distance? (Logically)

A rod made from insulating material carries a net charge, while a copper sphere is neutral. The rod and the sphere do not touch. Is it possible for the rod and the sphere to (a) attract one another and (b) repel one another? Explain.

Which of the following best explains why mutations cannot cause evolution?

We often use a spoon to cool coffee by stirring. Some of the heat is conducted from the coffee to the air by this method, but the spoon itself will cool the coffee a little.