Two point charges are fixed on the y axis: a negative point charge q1 = -24 µc at y1 = +0.19 m and a positive point charge q2 at y2 = +0.33 m. a third point charge q = +8.0 µc is fixed at the origin. the net electrostatic force exerted on the charge q by the other two charges has a magnitude of 18 n and points in the +y direction. determine the magnitude of q2.

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.

The energy equivalent of the rest mass of an electron is

Coal contains energy. a. light b. kinetic c. chemical d. mechanical