Tutor for physics classes in Simon Fraser University
(I) How does the number of atoms in a 27.5-gram gold ring compare to the number in a silver ring of the same mass?
(I) ($a$) "Room temperature" is often taken to be 68$^\circ$F. What is this on the Celsius scale? ($b$) The temperature of the filament in a lightbulb is about 1900$^\circ$C. What is this on the Fahrenheit scale?
(I) A thermometer tells you that you have a fever of 38.9$^\circ$C. What is this in Fahrenheit?
(II) Determine the temperature at which the Celsius and Fahrenheit scales give the same numerical reading ($T_C=T_F$).
(I) The Eiffel Tower (Fig. 13$-$31) is built of wrought iron approximately 300 m tall. Estimate how much its height changes between January (average temperature of 2$^\circ$C) and July (average temperature of 25$^\circ$C). Ignore the angles of the iron beams and treat the tower as a vertical beam.FIGURE 13–31 Problem 9. The Eiffel Tower in Paris. (CANT COPY FIGURE)
(I) Super Invar$^\mathrm{TM}$, an alloy of iron and nickel, is a strong material with a very low coefficient of thermal expansion (0.20 $\times$ 10$^{-6}$/C$^\circ$). A 1.8-m-long tabletop made of this alloy is used for sensitive laser measurements where extremely high tolerances are required. How much will this alloy table expand along its length if the temperature increases 6.0 C$^\circ$?Compare to tabletops made of steel.
