How much energy is released by the conversion of 4.2 x 10 kg of mass to energy? How much mass must be converted to energy to produce 1.00 J of energy?

Jason is a body builder. despite being more fit, he weighs more than his brother ryan, who is the same height. which is a possible reason? a. jason has more muscle mass than ryan does. b. jason has more body fat than ryan does. c. jason has more muscle mass and body fat than ryan does d. jason has less body fat than ryan does.

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?