HEL A rock at rest has weight 138 N. What is the weight of the rock when it is accelerating upward at 12 m/s2? A. 115 B. 138 C. 63 D. 304

12 drag each label to the correct category. decide whether each statement describes mass or weight. measured in newtons measured in kilograms does not change when gravity changes === a gravitational force changes when gravity changes the amount of matter in something mass weight

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

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.