# Question

Astronomers know that the temperatures of stellar interiors are “extremely high.” By this they mean they can convert from Fahrenheit to Celsius temperature using a rough rule of thumb:

(a) Determine the exact fraction (it isn’t 1/2) and

(b) The percentage error astronomers make by using ½ at high temperatures.

(a) Determine the exact fraction (it isn’t 1/2) and

(b) The percentage error astronomers make by using ½ at high temperatures.

## Answer to relevant Questions

Fig. 10.5 is a plot of Fahrenheit temperature versus Celsius temperature. (a) Is the value of the y-intercept found by setting (1) TF = TC, (2) TC = 0, or (3) TF = 0? Why? (b) Compute the value of the y-intercept. (c) ...How many moles are in (a) 40 g of water, (b) 245 g of CO2 (carbon dioxide), (c) 138 g of N2 (nitrogen), and (d) 56 g of O2 (oxygen) at STP? Is there a temperature that has the same numerical value on the Kelvin and the Fahrenheit scales? Justify your answer. If 2.4 m3 of a gas initially at STP is compressed to 1.6 m3 and its temperature is raised to 30 oC, what is its final pressure? A circular steel plate of radius 15 cm is cooled from 350 oC to 20 oC. By what percentage does the plate’s area decrease?Post your question

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