The lower the temperature of an object, the
A) lower the frequency of radiation it emits.
B) longer the wavelengths it radiates.
C) both of these
D) neither of these
Answer: C
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The largest of the red stars are the ____________________ stars
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A small airplane with a wing span of 12 m flies horizontally and due north at a speed of 60 m/s in a region where the magnetic field of the earth is 60 ?T directed 60° below the horizontal. What is the magnitude of the induced emf between the ends of the wing?
A. 50 mV B. 31 mV C. 37 mV D. 44 mV E. 22 mV
Because of absorption, a Polaroid will actually transmit about 40% of incident nonpolarized light. Two Polaroids with their axes aligned will transmit
A) 0%. B) 40%. C) 100%. D) between 0% and 40%. E) between 40% and 100%.
The main purpose of DST is to save ______________
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