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Physics, 22.06.2019 18:30, SoccerHalo
Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm
Answers: 2
Physics, 23.06.2019 16:30, shortcake8047
Figure shows a simple cathode-ray tube. a beam of particles, emitted by the cathode, strikes the centre of the screen. a. why the cathode must be heated? b. what is the principal energy change that occurs when the beam strikes the screen? c describe and explain what you would expect if the two deflecting plates g and h were connected to an alternating voltage supply
Answers: 3
What is the electric potential of a 4.5 × 10-5 C charge that has an electric potential energy of 0.0...
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