# Question: Astronomers know that the temperatures of stellar interiors are extremely

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