Warmup 24: Heat Transfer II

Course

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IN:
The first three questions refer to the material you were to read in preparation for the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle. Questions 4 is your opportunity to suggest what we should emphasize today and how.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT button at the bottom of this page.


1.

Explain how you would determine the amount of energy needed to transfer to a known mass of a known substance to raise it's temperature by a given amount delta T.




2.

If temperature is a measure of the average kinetic energy of the molecules in a sample, and the energy required to raise the temperature of a sample is Q = mc delta T, then how much total kinetic energy does a 50 g block of lead have at room temperature T = 22 degrees ?



3.

Both cups of water started out at room temperature. Which cup required the greatest amount of energy to raise its temperature to that indicated in the picture ?

  1. Cup A required the most energy
  2. Cup B required the most energy
  3. Both cups required the same amount of heat
  4. Not enough information to answer



4. Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.):




You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT button.

I received no help from anyone on this assignment.