In the context of the mass-luminosity relation, a star with a mass of 2 solar masses on the main sequence would have a luminosity of approximately _____ solar luminosities
A) 2.5
B) 4
C) 11
D) 0.5
C
Physics & Space Science
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A gasoline engine absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle. The amount of heat expelled in each cycle is
A. 1000 J B. 1500 J C. 2000 J D. 500 J E. 3000 J
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Coulomb's law is similar in form to
A. all of Newton's laws of motion B. Newton's law of gravity C. Ohm's law D. Faraday's law
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A 1000-turn toroid has a central radius of 4.2 cm and is carrying a current of 1.7 A. The magnitude of the magnetic field along the central radius is
A) 8.1 × 10-3 T. B) 5.1 × 10-2 T. C) 1.6 × 10-2 T. D) 8.1 × 10-2 T. E) 0.
Physics & Space Science