A 7 kg bowling ball is lifted 2.4 m into a storage rack.
The acceleration of gravity is 9.8 m/s?.
Calculate the increase in the ball's potential
energy.
Answer in units of J.

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s