A laser produces a beam of 4000-nm light. A shutter allows a pulse of light, 30 ps in duration, to pass
Which of the following is closest to the uncertainty in the energy of a photon in the pulse? ( h = 1.055 × 10-34 J • s = 6.59 × 10-16 eV • s)
A) 10-3 eV B) 10-6 eV C) 10-4 eV D) 10-2 eV E) 10-5 eV
E
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Kinetic energy refers to the energy of a(n)____
a. stationary body b. moving body c. moon d. gravitational field e. object due to its position
Which best describes the surface of Callisto?
a. dark and dirty ice, heavily pocked with craters b. old and dark on some portion, but cratered with a young bright grooved terrain c. icy crust free of craters with a liquid water ocean beneath d. covered in active sulfur-based volcanoes e. mostly water ice mixed with methane
Earth and Venus have more substantial atmospheres because they are larger and had more volcanic activity.
Answer the following statement true (T) or false (F)
During each cycle, the compressor in a certain ideal Carnot refrigerator performs 480 J of work to remove 150 J of heat from the interior of the refrigerator. How much heat do the coils behind the refrigerator discharge into the kitchen each cycle?
A) 110 J B) 150 J C) 330 J D) 480 J E) 630 J