Question

3. A weather balloon rises through the atmosphere, its volume expanding from 3.3 m3 to 14 m3 as the temperature drops from 18 ∘C to -13 ∘C.

Part A) If the initial gas pressure inside the balloon is 1.0 atm, what is the final pressure?

6. It's possible to boil water by adding hot rocks to it, a technique that has been used in many societies over time. If you heat a rock in the fire, you can easily get it to a temperature of 500∘C. If you use granite or other similar stones, the specific heat is about 800 J/(kg⋅K).

Part A) If 5.0 kg of water at 10∘C is in a leak-proof vessel, what minimum number of 1.0 kg stones must be added to bring the water to a boil?

Express your answer as an integer.

Answer 1