Atennis ball with a speed of 25.9 m/s is moving perpendicular to a wall. after striking the wall,
the ball rebounds in the opposite direction with a speed of 21.3157 m/s. if the ball is in contact
with the wall for 0.0133 s, what is the average acceleration of the ball while it is in contact with
the wall? take "toward the wall” to be the positive direction. answer in units of m/s 2

Aball is thrown straight up into the air with a speed of 21 m/s. if the ball has a mass of 0.1 kg, how high does the ball go? acceleration due to gravity is g = 9.8 m/s^2. a. 22.5 m b. 20.0 m c. 25.0 m d. 17.5 m

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse