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$g_w=4.4 \times 10^7 N/kg$

Giancoli 6th Edition, Chapter 5, Problem 37

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Chapter 5, Problem 37 is solved.

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Transcript for this Giancoli solution

The acceleration due to gravity on this white [dwarf] is ‘gw’ which equals ‘G’ times mass of the white [dwarf] divided by its radius squared. The mass of the white [dwarf] is the same as the masses of our sun which we look up in front cover of the text book, one point nine nine time ten raised to power thirty kilograms. Its radius is the same as the radius of the moon which is one point seven four times ten raised to power six meters. So the acceleration due to gravity on the white [dwarf] ‘gw’ is: to six point six seven times ten raised to power minus eleven times one point nine nine times ten raised to power thirty kilograms divide by one point seven for times ten raised to power six meters and we’ll square that giving us an answer four point four point four times ten raise to power seven meters per second squared.