Physics, 20.04.2020 22:47 jgcugucgucg
Magnetic Levitation (maglev) trains use electricity to generate magnetic fields. How are these magnetic fields related to the forward motion of the train? A) Electricity is used to generate a magnetic field opposite that of the train so the train is pulled forward along a frictionless surface. B) Electricity is used to generate a magnetic field of the same polarity as that at the base of the train. This elevates the train and also moves it forward. C) Electricity generates a magnetic field as it flows through coils on the train. A large electromagnetic at the opposite end of the track pulls the train to its destination and lifts it off the track. D) A current below the train generates a magnetic field that levitates the train, by using the repulsion of like charges. Electricity flows through coils on the side of the track, as the current alternates it pulls the train forward and pushes it from the back.
Answers: 1
Physics, 22.06.2019 05:00
Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?
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Physics, 22.06.2019 06:00
What will a positive and a negative charge do if they are separated from each other?
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Physics, 22.06.2019 15:10
An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 Ëšf and standard atmospheric pressure, what is the value of the mach number?
Answers: 2
Magnetic Levitation (maglev) trains use electricity to generate magnetic fields. How are these magne...
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