PLS HELP A system does 566 kJ of work and loses 216 kJ of heat to the surroundings.

What is the change in internal energy, Δ , of the system? Note that internal energy is symbolized as Δ in some sources.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?

What are several ways to reduce the effect of friction