Which of the following statements is false?
a. The angle ? in Snell's law is measured between the ray and a line perpendicular to the surface.
b. Photons of blue light have a higher energy than photons of red light
c. A photon's energy depends on its brightness.
d. The ratio v/? of a photon's speed to its wavelength has the same value for any index of refraction n.
c
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A neutral atom has an electron configuration of 1s22s22p63s23p2. How many protons does it have in its nucleus?
A) 5 B) 11 C) 14 D) 20 E) 26
A satellite is in a circular parking orbit 6.98 × 106 m from the center of Earth. To initiate a Hohmann transfer, a rocket gives it an accelerating thrust so that its speed is increased to 8300 m/s
How far from the center of Earth will the satellite be when it reaches its apogee? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2. A) 3.12 × 107 m B) 2.48 × 107 m C) 1.06 × 107 m D) 6.73 × 107 m E) 4.75 × 107 m
The distance to the sun is about 150 million km. Expressed in powers of ten, this is
A) 1.5 × 106 km. B) 1.5 × 108 km. C) 1.5 × 10-8 km. D) 1.5 × 10-6 km. E) None of the above.
In a transformer, the power input
A) is larger than the power output. B) is equal to the power output. C) is smaller than the power output. D) can be either larger or smaller than the power output.