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svlad2
5 days ago
14

Jules is conducting an experiment involving friction. He is measuring the temperature of various objects and surfaces after quic

kly rubbing them together.
He is testing a steel ball bearing and a tennis ball on carpet, linoleum flooring, and a glass surface by rubbing the object 20 times in 6 seconds over the surface.
Match the predictions based on the most likely result of his experiment
correct prediction -


incorrect prediction -


The tennis ball over the linoleum floor will have no friction, as the temperatures will not change.

The temperature of the surface of the ball bearing when rubbed over glass will be the least.
Physics
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What is the internal energy (to the nearest joule) of 10 moles of Oxygen at 100 K?
serg [3582]

Response:

U = 12,205.5 J

Clarification:

To determine the internal energy of an ideal gas, use the following equation:

U=\frac{3}{2}nRT        (1)

U: internal energy

R: ideal gas constant = 8.135 J(mol.K)

n: number of moles = 10 mol

T: the temperature of the gas = 100K

Substituting the parameter values into equation (1):

U=\frac{3}{2}(10mol)(8.135\frac{J}{mol.K})(100K)=12,205.5J

The overall internal energy for 10 moles of Oxygen at 100K is 12,205.5 J

6 0
1 month ago
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