The system shown here is a simple hydraulic lift. By pushing down on piston A, you can create
upward force at piston B. If there is .300 kg of
mass on B, which has an area of .01 meters
squared. How much force on piston A will be
required hold the weight, if the area of piston A is
.0033 meters squared? (Don't forget the units in
your answer.)

What happens in a global convection cell

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th