2. what is net force?
a. the force that opposes gravity
b. a force applied to an object to make
it move
c. the total of all forces on an object
d. a force that cancels another force

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?