Physics, 22.11.2019 01:31 garretthyatt123
True or false: (a) maxwell's equations apply only to fields that are constant over time.(b) the wave equation can be derived from maxwell's equations.(c) electromagnetic waves are transverse waves.(d) in an electromagnetic wave in free space, the electric and magnetic fields are in phase.(e) in an electromagnetic wave in free space, the ratio of the magnitudes of electric and magnetic field vectors e and b is equal to c (speed of ) in an electromagnetic wave in free space, the electric and magnetic energy densities are equal.
Answers: 1
Physics, 22.06.2019 10:00, squirrel6875
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.
Answers: 1
Physics, 22.06.2019 10:30, zoebtharpe
An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
Answers: 2
Physics, 22.06.2019 15:30, haileyjones732
Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.
Answers: 1
True or false: (a) maxwell's equations apply only to fields that are constant over time.(b) the wav...
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