In an isochoric process, the internal energy of a gas decreases by 50 J. How much work is done by the gas during this process?

Group of answer choices

50 J

-25 J

0 J

25 J

-50 J

A person weighing 900 N is standing on snowshoes. Each snowshoe has area 2500 cm²and has negligible weight. What pressure does this person's weight exert on the snow?

Group of answer choices

0.18 N/m²

3600 N/m²

1800 N/m²

0.36 N/m²

A child does 350 J of work while pulling a box from the ground up to his tree house at a steady speed with a light rope. The tree house isabove the ground. What is the mass of the box?

Group of answer choices

6.7 kg

5.3 kg

8.0 kg

8.9 kg