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13 November, 19:11

Which of the following would be used in luminosity calculations?

candela

joule

kilogram

ampere

2. Work, measured in joules, is force * distance.

If the unit of force is kg⋅m/s2, then which of the following is the correct description of joule in terms of SI base units?

kg⋅m/s3

kg⋅m/s2

kg⋅m/s

kg⋅m2/s2

3. In an experiment, you calculate Newton's universal gravitational constant to be 7.34*10-11 N⋅m2/kg2. The accepted value is 6.67*10-11 N⋅m2/kg2.

What is your percent error?

0.01%

0.1%

5%

10%