Fluid Mechanics and Thermal Physics

Question 1

Pressure in a static fluid column

Question 2

Buoyand force -Archimedes’ principle

Answer 2

Fb = ρV_g

Question 3

Continuity equation

Answer 3

A₁V₁ = A₂V₂

Question 4

Bernoulli’s equation

Question 5

Thermal Expansion

Question 6

Rate of Heat Transfer

Answer 6

where:

k = thermal conductivity of the substance

A = cross sectional area

DeltaT = temperature difference

L = length of the material

Question 7

Definition of Pressure

Question 8

Ideal Gas Law

Answer 8

PV = nRT

where:

P = pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = constant; 8.31 J/mol_*K

T = temperature of the gas in kelvins

Question 9

Average kinetic energy per molecule in an ideal gas

Answer 9

where k_b is the Boltzmann’s constant

k_b = 1.4 _* 10^-23 J/K

Question 10

RMS speed of the molecules of an ideal gas

Question 11

Work done on a gas in an isobaric process

Answer 11

this reminds you that work done on a gas in any process can be found by the area under the PV diagram

Question 12

First law of thermodynamics

Question 13

Definition of Efficiency

Answer 13

e = W/Q_H

Question 14

Efficiency of an ideal heat engine