In any one material, all electromagnetic waves have the same
a. wavelength.
b. velocity.
c. frequency.
d. amplitude.

If a simple machine reduces the strength of a force, what must be increased?

Which form of pure carbon is so hard that it can be used in cutting tools?

What surface does the epithelial tissue cover? a. the surface of the body b. lines internal organs c. forms many glands d. all of the above