Answers and hints to self check your work on Fluids/Thermo assessment.

AP Physics       ASSESSMENT    Fluids/Thermo   

Answers/hints to self-check 

1. (C) 8° C

2. (B) 4,800 J/s

3. (A) 40%


4. (A)   Area under curve is greatest.

5.(A)     pV is greatest, and this is proportional to T.

Free Response

1.

a) use T = ρV/ R and plug in for each one

b) use Q = ΔU - W

c) 2ρV₀

d) use ΔU = Q = 3/2 nRT

e)i) use ΔU = Q = 3/2 nRT

e)ii) ΔU = 0

2.

a) p = atmospheric pressure plus pressure due to weight on top of piston

b) use V = nRT / P

c) i) pressure stays the same

c) ii) H/T = H’/T’

d) use ΔU = Q = 3/2 nRT