A wheel rotating about a fixed axis has an angular position given by  = 3.0 − 2.0t 3 , where  is measured in radians and t in seconds. What is the angular acceleration of the wheel at t = 2.0 s? a. −1.0 rad/s2 b. −24 rad/s2 c. −2.0 rad/s2 d. −4.0 rad/s2 e. −3.5 rad/s2

Answer quickly (15 points) a comet is approaching earth. describe earth’s gravitational pull as the comet gets closer to it. a. remain constant b. increase c. decrease d. reversed

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .