Question

**In all questions: assume liquids(water, seawater, etc.) are incompressible**

QUESTION 20

1. Three flasks hold the same gas.

   • The first flask has volume V, pressure P, and n moles,

   • The second flask has volume 2V, pressure 2P, and n moles.

   • The third flask has volume 2V, pressure P, and 2n moles,

   • The fourth flask has volume V, pressure 2P, and 2n moles,

   • The fifth flask has volume 2V, pressure 2P, and 2n moles,

2. Which flask has the gas at the highest temperature?

		They are all at the same temperature
		Cannot tell- need another piece of information
		Flask 5
		Flask 2
		Flask 1
		Flask 3
		Flask 4

2 points   

QUESTION 21

1. Suppose you take a thin, weightless plastic baggie, and fill it with seawater that weighs 100 N. You seal the baggie, being sure there are no air bubbles. Now you tie the baggie to the end of a rope, and lower it into the ocean. F, the magnitude of the force you must exert on the rope to support the weight of the baggie, is

		100 N
		more than 100 N
		zero
		more than zero, less than 100 N
		cannot tell- need more information

2 points   

QUESTION 22

1. A heavy wheel in the shape of a disk (mass M, radius r) spins at ω radians per second on a frictionless axis through its center of mass. A frictional force of magnitude F is applied to the edge of the wheel, and it comes to rest in 100 seconds. If the identical force is applied in the same way to a second disk of mass 2M and radius 2R spinning on a frictionless axis at initial angular speed ω, the time it would take for this second wheel to come to rest is    

		100 seconds
		Cannot tell- need more information
		50 seconds
		1200 seconds
		400 seconds
		600 seconds
		25 seconds
		800 seconds
		200 seconds
		1600 seconds

2 points   

QUESTION 23

1. A certain liquid is frozen into a solid ball, and floats on water in a glass. What happens to the level of the liquid in the glass when the solid ball melts (and mixes with the water)?
   

		cannot tell- need more information
		the level of the liquid falls
		the level of the liquid rises
		the level of the liquid stays the same

PLEASE ANSWER ALL QUESTIONS IN FULL

Answer 1

Answer 20.

As we know formula.

So for temperature of containers.

From Above data is higher temperature.

So FLASK 2 has high temperature.

Flask 1 flask 3 and flask 4 are at same temperature.

Thanks for asking.