Astronomy Question: If the semi-major axis of Mar's elliptic orbit is a= 228*10^9m. Then what will be the time period of the revolution of mars (T) around the sun in days? Hint: use Kepler's 3rd law of motion (T2 α a3).

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above