Light travels from crown glass, with a refractive index of 1.52, into water, having a refractive index of 1.33? The critical angle for this interface is closest to which one of the following angles?
A) 42°
B) 48°
C) 53°
D) 57°
E) 61°
E
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We have an initially uncharged hollow metallic sphere with radius of 5.0 cm. I place a small object with a charge of +20 µC at the center of the sphere through a hole in the surface. Find the electric field present at a point 10 cm from the sphere's center. (ke = 8.99 × 10^9 N/m2/C2)
a. 3.6E+7 N/C b. 9.0E+6 N/C c. 1.8E+7 N/C d. 4.5E+6 N/C e. 2.7E+7 N/C
A ball is thrown straight upward with an initial speed of 30 m/s. Assuming there is no air resistance, how high does the ball go before falling back down?
The speed of light is equal to:
a. one light-year per year. c. one meter per nanosecond. b. 5.28 × 10^7 miles per hour. d. none of the above.
The Kuiper Belt is found where in the solar system?
A) among the orbits of the terrestrial planets B) beyond the orbit of Neptune C) between the orbits of Mars and Jupiter D) between the orbits of Jupiter and Uranus E) sixty degrees ahead of or behind Jupiter