The same balloon which has a charge of 7.2 nC is brought close to another student's hair who's charge is unknown. The force experienced is 152 N and the distance between the balloon and

hair is 0.15 m. What is the charge on the student's hair (the second charge)?

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.