Independent measurements of two lengths are made. The results are x=95 +- 0.1 and y=2.30+-0.02 cm a) calculate the difference l=x-y and the corresponding uncertainty.
b) calculatr the relative uncertainty on the difference

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

What part of the ear is names after tools, such as the hammer and the anvil?