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Author Question: If the total translational kinetic energy of the molecules of oxygen in a container is 15 J at room ... (Read 76 times)

BRWH

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on: Jul 28, 2018
If the total translational kinetic energy of the molecules of oxygen in a container is 15 J at room temperature, what is the total rotational kinetic energy of these molecules?
 a. 5 J
 b. 10 J
  c. 20 J
  d. 25 J
  e. 0 J

Question 2

In braking an automobile, the friction between the brake drums and brake shoes converts the car's kinetic energy into heat. If a 1500-kg automobile traveling at 30 m/s brakes to a halt, how much does the temperature rise in each of the four 8.0-kg brake drums? (The specific heat of each iron brake drum is 448 J/kg/C).


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dpost18

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Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

47C


BRWH

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Reply 2 on: Jul 28, 2018
Wow, this really help

xiaomengxian

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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