Problem
1. A spherical helium balloon 10 m in diameter is at ambient T and P, 15?C and 100 kPa. How much helium does it contain? It can lift a total mass that equals the mass of displaced atmospheric air. How much mass of the balloon fabric and cage can then be lifted?
2. A glass is cleaned in hot water at 45?C and placed on the table bottom up. The room air at 20?C that was trapped in the glass is heated up to 40?C and some of it leaks out, so the net resulting pressure inside is 2 kPa above the ambient pressure of 101 kPa. Now the glass and the air inside cool down to room temperature. What is the pressure inside the glass?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.