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teysha teysha
wrote...
6 years ago
A container is filled with a mixture of helium and oxygen gases. A thermometer in the container indicates that the temperature is 22.C. Which gas molecules have the greater average kinetic energy?
 
  A) It is the same for both because the temperatures are the same.
  B) The oxygen molecules do because they are more massive.
  C) The helium molecules do because they are monatomic.
  D) The oxygen molecules do because they are diatomic.
  E) The helium molecules do because they are less massive.

Question 2

A satellite orbits the Earth once every 6.0 hours in a circle. What is the acceleration of the satellite (direction too)?
 
  What will be an ideal response?

Question 3

Coefficient of performance is
 
  A) 1 - Qcold/Qhot.
  B) Q/m.
  C) Qout/Win.
  D) Q - W.
  E) 1 - Tcold/Thot.

Question 4

Usually one can touch the terminals of a battery (e.g., 1.5 volts) with no dire consequences.
 
  Why do hospital intensive care rooms go to great effort and expense to attach ground wires to equipment in order to guard against the presence of low potentials? (i.e., why are low voltages hazardous in hospitals?)

Question 5

A 60. kg person walks along a 100. kg log at the rate of 0.8 m/s (with respect to the log). With what speed does the log move, with respect to the shore?
 
  What will be an ideal response?
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strevi49strevi49
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Posts: 313
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6 years ago
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teysha Author
wrote...
6 years ago
My teacher is very rude and likes to speed his way through a lesson without letting the class ask questions. Thank you for helping me. You're a life saver Slight Smile
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