Physics, 19.12.2020 22:00 lukaslinder3529
The sound level at a point P is 14 db below the sound level at a point 1.0 m from a point
source. Assuming the intensity from a point source drops off like the inverse square of
the distance, the distance from the source to point P is:
Answers: 2
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If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c
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Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?
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On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)
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Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.
Answers: 2
The sound level at a point P is 14 db below the sound level at a point 1.0 m from a point
source. A...
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