A particle with non-zero kinetic energy will
A. always have the same wavelength as the same energy photon.
B. always have a greater wavelength than the same energy photon.
C. always have a shorter wavelength than the same energy photon.
D. sometimes have a greater wavelength than the same energy photon.
E. sometimes have a shorter wavelength than the same energy photon.
C. always have a shorter wavelength than the same energy photon.
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What is one possible reasons Jupiter and Saturn radiate more energy than they receive from the sun?
a. Magnetic and electric fields heat the planet. b. Fusion reactions of hydrogen into helium inside the planet provide an additional heat source. c. The planets are still radiating heat from when they first formed. d. Friction between the planet and its moons heat the planet.
Because more massive stars have more gravitational energy, they can fuse heavier nuclear fuels
a. True b. False Indicate whether the statement is true or false
A step-up transformer steps up voltage by ten times. Neglecting slight losses, if 100 W of power go into the primary coil, the power coming from the secondary coil is
A) 1 W. B) 10 W. C) 100 W. D) 1000 W. E) none of the above
A watch dial that continues to glow after a week in the dark is almost certainly
A) fluorescent. B) phosphorescent. C) polarized. D) radioactive.