A car weighing 12,000N12,000N is raised using a hydraulic lift, which consists of a U-tube with arms of unequal areas, filled with incompressible oil with a density 800 kg/m^3800kg/m 3 and capped at both ends with tight-fitting pistons. The car rests on the piston on the wider arm of the U-tube that has a radius of 18.0cm18.0cm, and the narrower arm has a radius of 5.00cm5.00cm. The pistons are initially at the same level. The pistons are initially at the same level. What is the initial force that must be applied to the smaller piston in order to start lifting the car

This is the substance(s) formed in a chemical reaction.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2