A quantum of electromagnetic radiation is a
a. wave function.
b. photon.
c. de Broglie wave.
d. laser.
e. hologram.
b
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The Doppler effect is sensitive only to motion along the line of sight
a. True b. False Indicate whether the statement is true or false
Various observations suggest there may be recent or even continuing volcanic activity on Venus. Which of the following has NOT been observed?
A) bursts of radio energy, similar to those produced by lightning discharges occurring in the plumes of erupting volcanoes on Earth B) spacecraft detection over a period of days of flowing lava on Venus C) fluctuations in the level of sulfur dioxide in the planet's atmosphere D) surface features resembling rift valleys on Earth E) larger shield volcanoes than Hawaii
In Hubble's "tuning fork," spirals are on the parallel branches
Indicate whether the statement is true or false
A current-carrying 2.0-cm long segment of wire is inside a long solenoid (radius = 4.0 cm, n = 800 turns/m, current = 50 mA). The wire segment is oriented perpendicularly to the axis of the solenoid. If the current in the wire segment is 12 A, what is the magnitude of the magnetic force on this segment?
a. 22 ?N b. 16 ?N c. 18 ?N d. 12 ?N e. 0 ?N