The allowed values for the magnetic quantum number, m? , are from m? = -? to +?
Indicate whether the statement is true or false
TRUE
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Motional Emf: A airplane having a metal surface and a wingspan of 25.0 m flies horizontally at 200. m/s where the earth's magnetic field is vertical with magnitude 45.0 ?T.(a) What emf is induced across the wings?(b) What wingspan would the plane need to produce 1.00-V emf across its wings?(c) The plane now reverses direction. Does the polarity of the wingtip emf change? That is, if the left wing was positive before, does it now become negative?
What will be an ideal response?
At what rate are photons emitted by a 50. W sodium vapor lamp? (Assume that the lamp's light is monochromatic and of wavelength 589. nm.)
What will be an ideal response?
An n-type semiconductor is produced by
A) pure crystals of germanium. B) doping the host crystal with donor impurities. C) doping the host crystal with acceptor impurities.
When a jet airplane takes off, how is momentum conserved?
a. Momentum is conserved because the jet of hot air pushes on the atmosphere around it. b. Momentum is conserved because the air rushing out of the jet engine is moving out in the direction opposite to the plane's movement. c. Momentum is not conserved because the jet was motionless and is now moving. d. Momentum is conserved because molecules in the air move on average in all directions. e. Momentum is conserved because the jet is collecting oxygen from the atmosphere.