1.What would happen to the pressure in a basketball as the ball approaches absol
ID: 1411148 • Letter: 1
Question
1.What would happen to the pressure in a basketball as the ball approaches absolute zero? (assume the volume of the ball does not change)
a. Pressure approaches 0 kPa
b. Pressure is reduced by half
c. Nothing happens to the pressure d. Pressure gets doubled
e. Pressure approaches infinity
2. Why does a can of compressed air get colder as you empty the can? (the can is metal so it doesn’t change shape)
a. Temperature of the can stays the same
b. The can does not get colder, but actually gets warmer c. Pressure decreases so temperature also decreases
d. Volume increases so temperature decreases
e. The can gets colder because it is metal
3. According to the Kinetic Theory of Gases, how is the pressure of a gas related to its molecules?
a. More molecules means more pressure
b. The pressure of a gas is directly proportional to the total kinetic energy of its molecules
c. The pressure of a gas is indirectly proportional to the total kinetic energy of its molecules
d. The pressure of a gas is directly proportional to the average kinetic energy of its molecules
e. The pressure of a gas is indirectly proportional to the average kinetic energy of its molecules
4. What is Young’s modulus, Shear modulus, and Bulk modulus dependent on? a. The material of the solid
b. The force applied
c. The initial length of the material
d. The stretched length of the material e. The crosssectional
area
5. What happens to a solid when the stress applied surpasses the elastic limit, but has not yet reached the breaking point?
a. It eventually returns to its original shape b. It is permanently deformed
c. It will break
d. It acts like a spring
e. It depends on the material
Explanation / Answer
The concept of the ideal gas law:
PV = nRT.
P = pressure, T temperature, V = volume; R = ideal gas constant; n= amount of gas in moles.
In a ball, V,n, R remains constant.
so a drop in temperature necessarily results in a drop in pressure.
But at absolute zero , gas turns into liquid/ solid inside the ball . and hence will not have any pressure as such or P = 0
2. c. Pressure decreases so temperature also decreases
3. d. The pressure of a gas is directly proportional to the average kinetic energy of its molecules
4. a. The material of the solid
5.b. It is permanently deformed
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