The refrigerant leaving the evaporator of a TXV system will A. be colder than refrigerant entering the system. B. always be a vapor. C. be superheated a few degrees. D. be a mixture of water and solids.​

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?

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