THERMAL PHYSICS PHY474

## HOMEWORK #1

Convert a density of 1g/cmto Kg/m3 and to mg/l.

Air flows over the top of an airplane wing of area A with speed vtop and under the wing with speed vunder. By using the Bernoulli equation show that upward lift force on the wing is

HALLIDAY, RESNICK, WALKER CH.14: 1, 3, 10, 35, 55, 62, 67, 68, 80, 82, 85.

DUE: WEDNESDAY, SEPTEMBER 8, 2010

## HOMEWORK #2

• A steel rod has a length of 20cm at 30C. How much longer is at 50C?
• A pendulum clock made of brass is design to keep accurate time at 20C. What will be the error in seconds per hour, if the clock operates: (i) at 5C and (ii ) at 35C?
• HALLIDAY, RESNICK, WALKER CH.18: 8, 9, 38, 43, 70, 88, 99.

DUE: MONDAY, SEPTEMBER 13, 2010

## HOMEWORK #3

For each of the following differentials determine if it is exact. If it is exact, integrate to determine u(x,y):

(a)    du = xydx + xydy; (b) du = xy2dx +x2ydy; (c) du = sin(x)dx + cos(y)dy

• CALLEN CH.1 SECT.3: 1, 2.

DUE: MONDAY, SEPTEMBER 20, 2010

## HOMEWORK #4

CALLEN: CH.1 SECT.8: 5, 7;

CALLEN: CH.3 SECT.4: 3, 4, 8, 9, 10;

CALLEN: CH.3 SECT.9: 3.

DUE: WEDNESDAY, SEPTEMBER 29, 2010

## HOMEWORK #5

CALLEN: CH.3 SECT.2: 1

HALLIDAY, RESNICK, WALKER CH.19: 3, 12, 16, 17, 63, 78.

DUE: MONDAY, OCTOBER 4, 2010

## HOMEWORK #6

• CALLEN: CH.3 SECT.5: 2, 3, 6.
• Calculate the work done on N moles of an ideal van der Waals fluid when the volume changes from Vi to Vf in an: (a) isobaric process at pressure p; (b) isothermal process at temperature T; (c) adiabatic process if initial pressure is pi.

DUE: MONDAY, OCTOBER 11, 2010

## HOMEWORK #7

• CALLEN: CH.2 SECT.6: 3, 4;
• CALLEN: CH.2 SECT.7: 2;
• HALLIDAY, RESNICK, WALKER CH.20: 7, 16, 21.

DUE:

## HOMEWORK #8

• CALLEN: CH.2 SECT.8: 1.

DUE:

## HOMEWORK #9

• HALLIDAY, RESNICK, WALKER CH.20: 35;
• CALLEN: CH.4 SECT.6: 1, 3, 4, 6;
• CALLEN: CH.4 SECT.10: 2, 3.

DUE:

## HOMEWORK #10

• CALLEN: CH.3 SECT.6: 1, 2, 3;
• CALLEN: CH.4 SECT.7: 2.

DUE:

## HOMEWORK #11

• Show that:
• CALLEN: CH.5 SECT.3: 3.

DUE:

## HOMEWORK #12

• CALLEN: CH.9 SECT.3: 3, 5;
• CALLEN: CH.9 SECT.4: 3, 4, 9.
• Compute the slope of the coexistence line dp/dT in Pa/K for water in the following cases: (a) boiling under atmospheric pressure: T = 100 C, latent heat l = 540cal/g, vgas = 1.6729 l/g, vliq = 1.044*10-3 l/g; (b) freezing under atmospheric pressure: T = 0 C, latent heat l = 80 cal/g, vice = 1.25 cm3/g, vliq = 1.0 cm3/g.

DUE:

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