What are the TWO conditions for a system to be in mechanical equilibrium?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

True or false graphs must include scales that increase by the same amount

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.