The graph represents energy changes that occur during a chemical reaction. What does the graph show about the reaction? a. The reaction absorbs energy. B. The reaction releases energy c. The reaction destroys energy (noPe) d. The reaction does not involve energy (no?)

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and