Ametal surface is illuminated by light with a wavelength of 450 nm . the maximum kinetic energy of the emitted electrons is found to be 1.20 ev .what is the maximum electron kinetic energy if the same metal is illuminated by light with a wavelength of 350 nm ?

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.

Mixing salt in water is an example of physical change

5400 j of energy are given off when a 50 g of aluminum pan changes temperature. does the temperature of the pan increase or decrease and by how much?