A system releases 680 kj of heat and does 150 kj of work on the surroundings. what is the change in internal energy of the system?

what powerful force allows black holes to absorb light A. Nuclear fusion B. electromagnetism C. Gravity D. Nuclear banding E. all of the above

Can the force of gravity change on our own planet? Explain.

A certain object has 11 J of kinetic energy while traveling at 22m/s. At what speed does it need to travel to have 15 J of kinetic energy?

Why does the balloon stick to the wall

Which scientists supported the heliocentric model of the solar system? Check all that apply. a. Aristotle b. Copernicus c. Galileo Kepler d. Ptolemy

Which compound is composed of oppositely charged ions

Sara, who weighs 66 kg, is on a guilt trip after eating a 788-Calorie (788 kcal) breakfast of pancakes loaded with fruits, cream, and syrup. She decides to work out before going to her weekly weight-watchers' meeting.

Can you get sunburned through glass?

Which statement about a signal transduction pathway is true? a. A signal transduction pathway provides a means for a signal molecule to pass through the cell membrane and initiate a chain of events inside the cell. b.

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be A. greater than the force of friction exerted upon the car. B. less than the force of friction exerted upon the car. C.