Upgrade to remove ads
Only $35.99/year

Physics Test 3

Terms in this set (29)

The slope of a straight line on a graph of stress vs strain represents
Young's modulus
Strain is
The ratio of the change in length to the original length
As one stretches a metal rod, which condition is reached first?
proportional limit
A piece of iron sinks to the bottom of a lake where the pressure is 21 atm, Which statement best describes what happens to the volume of that piece of iron
Its volume decreases slightly
All of the following are dimensionless except
Bulk's modulus
A piece of iron sinks to the bottom of a lake where the pressure is 21 atm. What statement best describes what happens to the density of the piece of iron
Its density increases slightly
Which of the following is not a unit of pressure?
N-m^2
When you are scuba diving, the pressure on your face plate
depends only on your depth and not how you are oriented.
The density of water is
1.0 Mg/m^3
Consider an object floating on a pool of water. Suppose much oil is poured onto the water and now floats above the water, with the object floating with part surrounded by a layer of oil and the lower part still in the water. How was the buoyant force changed by the oil layer?
remained the same
The pressure differential across a wing cross section due to the difference in air flow is explained by
Bernouilli's equation
Which has the greatest effect on the flow of fluid through a pipe? That is, if you made a 10% change in each of the quantities below, which would cause the greatest change in flow rate?
The radius of the pipe
A viscous oil flows through a narrow pipe. If the diameter of the pipe were doubled, the flow rate should increase by what factor?
4
Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
increases the energy by a factor of four
A mass swinging on the end of a massless string undergoes SHM. Where is the instantaneous acceleration of the mass the greatest?
Both ends ("A and D in pic")
Sets with similar terms