Physics, 20.11.2019 19:31 angel34emb
Atrumpeter is placed on a moving sidewalk that moves at a constant velocity of 4.5 m/s. a listener is standing 6.0 m in front of the trumpeter on the same sidewalk. the trumpeter plays a note of frequency 290 hz. the air is still and the speed of sound is what frequency of the note does the listener hear?
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Physics, 21.06.2019 17:10
An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of 10000 n. how far does the car travel before stopping?
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Physics, 22.06.2019 10:00
There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.
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Physics, 22.06.2019 12:30
Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.
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Physics, 22.06.2019 14:50
Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.
Answers: 2
Atrumpeter is placed on a moving sidewalk that moves at a constant velocity of 4.5 m/s. a listener i...
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