The product of an object’s mass and velocity is its
a. centripetal force.
b. momentum.
c. net force.
d. weight.

Asample of a gaseous substance changes into a liquid

If steel is more dense that lake water, why can a boat float

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?