If the effort distance = 8 meters and the resistance distance = 1/2 meter. How much force does this man have to apply to lift the 1 ton (2000 N) weight?

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

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.

What is the frequency if a wave that pases a given pount 22 times in 2 seconds