A tennis ball moving with velocity v1 hits a stationary tennis ball. The collision is inelastic and the two balls start traveling together. What is the velocity of the two tennis balls moving together? A) 2v1 B) 1/2 v1 C) 1/3 v1 D) v1

Phase changes are chemical changes. true or false

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?