What's the internal heat gain in kW from a factory with 20 kW of surface- mounted lighting, 10 kW of running electric motors and 10 people doing light bench work? A. 23.8 B. 20.0 C.20.8 D.17.8

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?