If a total of 50 J of work are done on an object, its energy...
A. decreases by 50 J.
B. increases by 50 J.
C. doesn't change.
D. is transferred to another object.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?