# Physics Week Essay

Unit 6 Problem Set 1: Applying Thermal Expansion Learning Objectives and Outcomes 0 Calculate the thermal expansions of solids and liquids. Assignment Requirements Complete the following problem. Show all of you work. The formula for the linear expansion of a solid is given by: An iron rod (a = 1 1. 8 x 10-6 C-1)

DIFFERENCE between these scales is ONLY -? 273 of either measure, and that is w. r. T. The magnitude of the number IOWA. However, what is more important, perhaps, is that your value of IOWA is itself a rather loose characterization. Modern solar evolutionary models suggest rather that the Sun’s T_c is -? 1. 5 x IOWA (degrees Celsius or Kelvin’s) instead of merely -? IOWA. (Our understanding of solar physics is certainly such that an error of a factor of -? 1. N its central temperature would be considered way out of all reasonable possibility! ) Of course the numerical factor in front of IOWA would matter even more if one were using the (non-scientific) Fahrenheit scale. Once again, however (unlike National Geographic magazine, which should hang its head in shame over some of its IOWA and 32 degrees Fahrenheit! 2. What happens to the gas pressure within a sealed gallon can when it is heated? Cooled? Why? The gases in general obey the gas laws.

As per the law the pressure,volume and temperature of the gas is related as: PIP,IT Where is pressure at stage 1, VI is volume at stage 1 and TTL is temperature (Kelvin) for stage l,and UP,V and TO are the pressure,volume and temperature for stage 2. Now, if a gas contained in a sealed gallon is heated cooled the volume of the gas is constant but pressure and temperature will adjust u=in such a way that the : PIPIT left is more than TTL ,then( heating the gas ) as TO so UP will be more than Pl ,hence, the pressure will increase. left

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