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Author Question: A cubic box with sides of 20 cm contains 2 1023 molecules of helium with a root-mean-square (rms) ... (Read 38 times)

Arii_bell

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A cubic box with sides of 20 cm contains 2  1023 molecules of helium with a root-mean-square (rms) speed of 200 m/s. The mass of a helium molecule is 3.4  10-27 kg.
 
  What is the average pressure exerted by the molecules on the walls of the container? A) 3.39 kPa
  B) 1.13 kPa
  C) 570 Pa
  D) 2.26 kPa
  E) 9.1 Pa

Question 2

The velocity of propagation of a transverse wave on a 2.0 m long string fixed at both ends is 200. m/s. Which one of the following is not a resonant frequency of this string?
 
  A) 50 Hz
  B) 200 Hz
  C) 25 Hz
  D) 100 Hz



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guyanai

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Answer to Question 1

B

Answer to Question 2

C




Arii_bell

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Reply 2 on: Jul 27, 2018
:D TYSM


xthemafja

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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