Each Kilogram of Hydrogen That Fuses into Helium Releases About

question 6

Multiple Choice

Each kilogram of hydrogen that fuses into helium releases about 6 * 10¹⁴ joules of energy.How many tons of hydrogen are fused each second to power a massive main-sequence star with a luminosity of 100 L_SUN? (Note that 1 L_SUN = 4 *10²⁶ joule/second and 1 ton= 10³ kg.)

• A) 2*10⁶ tons
• B) 7 * 10⁷ tons
• C) 2 *10⁹ tons
• D) 7 *10¹⁰ tons
• E) 2 *10¹¹ tons

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Definitions:

SSR

Sum of Squared Residuals; it represents the sum of the squared differences between the observed and predicted values in statistical analysis.

Degrees Of Freedom

The number of values in a calculation that are free to vary while estimating statistical parameters or testing hypotheses.

MSR

Mean Squared Regression, a measure used in statistical analysis to describe the amount of variance explained by a regression model.

MSE

Mean Squared Error, a measure of the average of the squares of the errors—that is, the average squared difference between the estimated values and the actual value.