If an object is thrown up at an initial velocity of 9.8 m/s, how long will it take to fall back down to the ground?

1.0 s
2.0 s

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?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

70 give a real life example showing how sensory neurons work with the motor neurons