A gas heater warms a room mostly through
A. convection
B. conduction
C. radiation
D. depletion
Answer: A. convection
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Compared to infrared radiation, does ultraviolet radiation have longer or shorter wavelengths? Does ultraviolet radiation have higher or lower energy per photon?
What will be an ideal response?
Photons associated with the magnetic field used in magnetic resonance imaging have considerably less energy than the photons used in CT scans
Indicate whether the statement is true or false
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Answer the following statement true (T) or false (F)
The south end of a bar magnet is pushed downward toward a wire loop in the plane of the paper. In which direction is the induced current, and which way is the induced magnetic field?
A. clockwise, into the paper B. clockwise, out of the paper C. counter-clockwise, into the paper D. counter-clockwise, out of the paper E. There is no induced current.