Internal energy can only be changed by adding heat

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


False

Physics & Space Science

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For an ideal inductor in an ac circuit, how much energy is stored in the inductor at the instant when the current is zero?

A. maximum B. 1?2 maximum C. 0.707 maximum D. zero

Physics & Space Science

When astronomers first saw the spectrum of a quasar they did not recognize it because

a) the lines were so far shifted towards the red b) its spectral signature was masked by the presence of the central supermassive black hole c) the chemical elements present in a quasar were unfamiliar d) the lines were so far shifted towards the blue e) it was too faint to produce spectral lines of any sort

Physics & Space Science

What is the saros cycle?

A) the 26,000-year cycle of the Earth's precession B) the roughly 18-year cycle over which the pattern of eclipses repeats C) the roughly one-month cycle of lunar phases in the sky D) the annual cycle of the seasons

Physics & Space Science

The metric prefix that means one-hundredth (1/100) is

a. kilo-. b. centi-. c. mega-. d. milli-.

Physics & Space Science