2. which of the following is an example of acceleration.

a. a twirling ballerina
b. a car on a cruise control going 50 m/s east
c. mrs. crisp sliding on the gym floor at +2.23 m/s
d. a remote control car traveling at a constant rate 5 m/h

Photons with the highest energy have the longest period

At the negative terminal of the battery the electron has electric potential energy. what happens to this energy as the electron jumps from the negative to the positive terminal?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s