20 POINTS EASY ASAP SCIENCE
Why do we see different star patterns in different seasons of the year?

Because Earth rotates on its axis.
Because the stars move through space.
Because Earth moves around the sun.
Because the moon blocks some of the stars.

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.