Engine oil reduces friction between the moving parts in in a car energy by a.) cooling the engine
b.) making the parts sticky so that they move more slowly.
c.) making the parts slippery
d.) two of the above

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

With physics question #5? for any !

Which is an advantage of subdividing science into different areas?