The conductivity of a semiconductor sharply increases when 400 nm (or shorter) wavelength light is shone upon it. This is consistent with what energy gap for this material?
A)
3.6 eV
B)
0.45 eV
C)
2.0 eV
D)
3.1 eV
E)
1.0 eV
D
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What is the space probe that is currently orbiting Saturn and is responsible for numerous discoveries of storms and weather patterns in Saturn's atmosphere called?
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An electron is moving at a speed of 12 × 10^6 m/s at an angle of 30° with respect to a uniform magnetic field of 8.0 × 10^–4 T. What is the radius of the resulting helical path? (me = 9.11 × 10^–31 kg, qe = 1.6 × 10^–19 C)
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In this photo, water drops produce disturbances that move outward in circular patterns. What moves outward as drops hit the water's surface? (Hint: If a cork were floating on the water's surface, what would be its motion?)
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