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If the density of a gas at STP is , what is its molar mass?
22.4 g/mol
44.0 g/mol
88.0 g/mol
11.2 g/mol
The density of an ideal gas at STP is 1.25 g/L. What is its molar mass?
14 g/mol
28 g/mol
42 g/mol
56 g/mol
A metal wire of Young's modulus undergoes a strain of . What is the energy stored per unit volume in the wire?
10^4 J/m^3
10^5 J/m^3
10^6 J/m^3
10^7 J/m^3
Strain energy density is defined as:
Strain energy per unit volume
Strain energy per unit mass
Strain per unit volume
Stress per unit area
The strain energy per unit volume of a stretched wire is given by:
stress * strain
1/2 * stress * strain
stress / strain
strain / stress
Two wires of the same material and length but different cross-sectional areas and () are stretched by the same force. Which wire will have greater strain energy density?
The wire with cross-sectional area
The wire with cross-sectional area
Both wires will have the same strain energy density
Cannot be determined without knowing the Young's modulus
If the density of the fluid through which an object is falling increases, what will happen to the object's terminal velocity, assuming all other factors remain constant?
It will increase
It will decrease
It will remain the same
It will become zero
A steel ball is falling through glycerin. Which of the following factors does not directly affect its terminal velocity?
The radius of the steel ball
The viscosity of glycerin
The density of steel
The height from which it is dropped
The escape velocity from the Earth's surface is . The escape velocity from the surface of another planet having a radius four times that of Earth and the same mass density is:
v
4v
2v
0.5v
