Physics, 23.08.2019 14:00 townselt6855
Astationary motion detector sends out a sound wave of frequency f = 3.3-hz towards an approaching car. the wave is reflected off the car and the reflected wave is picked up by the motion detector. when the reflected wave is superimposed on the original wave, it is found that the sum produces a beat frequency fbeat = 0.070-hz. find the speed of the car. you may assume the speed of sound in air to be 340-ms-1
Answers: 1
Physics, 22.06.2019 06:30
The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?
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Physics, 22.06.2019 08:30
A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.
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Physics, 22.06.2019 11:00
Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?
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Physics, 23.06.2019 00:30
Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero
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Astationary motion detector sends out a sound wave of frequency f = 3.3-hz towards an approaching ca...
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