Absolute visual magnitude is the:

A) apparent magnitude of a star observed from Earth.
B) luminosity of a star observed from a distance of 1000 pc.
C) apparent magnitude of a star observed from a distance of 10 pc.
D) luminosity of a star observed from Earth.


C

Physics & Space Science

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A heat engine has an efficiency of 35.0% and receives 150 J of heat per cycle. How much work does it perform in each cycle?

A. zero B. 52.5 J C. 97.5 J D. 150 J

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The deuterium and lithium-7 in distant quasars and in the interstellar medium suggests that the Universe is open

a. True b. False Indicate whether the statement is true or false

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Instructions: On occasion, the notation will be a shorthand notation for .

Given that  and , what is ?  A.


B.

C.

D.
?


E.

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The direction of the magnetic field of a bar magnet is

a. in the direction a compass would point. b. in any direction. c. away from the south pole. d. toward the north pole.

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