If you have a mechanical advantage of 2 with a block and tackle system. How much force do you have to pull with? Twice
one quarter
Three times
Half

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.