A wave moves in a rope with a certain wavelength. A second wave is made to move in the same rope with twice the wavelength of the first wave. The frequency of the second wave is _________ times the frequency of the first wave
Fill in the blank(s) with correct word
1/2
Physics & Space Science
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What will be an ideal response?
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Estimate the time required to heat the center of a 1.5-kg roast in a 163°C oven to 77°C. State your assumptions carefully and compare your results with cooking instructions in a standard cookbook.
GIVEN
FIND
The time required to heat the roast
ASSUMPTIONS
SKETCH
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Careful observations of the sky by ancient cultures served the practical purpose of
A) keeping track of time B) improving night vision C) religious worship D) keeping track of the changing position of the Earth around the Sun
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The flattest of all galaxies belong to class
A) S0. B) Sc. C) Irr II. D) E7. E) SBb.
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