Physics, 04.02.2020 19:56 Nextlevel3
Cell phones depend on both mechanical and electromagnetic waves to be useful. which answer below correctly identifies how each wave is used in cell phones?
mechanical waves allow the buttons to be pressed to make a call; electromagnetic waves allow a signal to be picked up when making a call
mechanical waves light up the screen; electromagnetic waves create the sound when the phone is ringing
mechanical waves allow the cell phone to emit a sound when ringing; electromagnetic waves allow a signal to be picked up when making a call.
mechanical waves allow a signal to be picked up when making a call; electromagnetic waves allow the cell phone to emit a sound when ringing
Answers: 2
Physics, 22.06.2019 06:00
The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.
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Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?
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Physics, 22.06.2019 18:30
Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.
Answers: 1
Cell phones depend on both mechanical and electromagnetic waves to be useful. which answer below cor...
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