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

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

What’s #16 asking me and how do i solve it?

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.