A system of an electron, a proton, and a neutron has a net charge of
a. +1.6 10-19 C.
b. 1.6 10-19 C.
c. 3.2 10-19 C.
d. zero.
[Ques. 2] Suppose a 5.0-meter diameter telescope were constructed on the dark side of the moon. The viewing there (except for brief periods of sunlight) would be excellent. As an example, what would be the separation between two objects that could just be resolved on the planet Mars in 500 nm light? The distance to Mars at closest approach is 50 million miles.
[Ques. 3] Which of the Galilean moons has volcanic activity?
a. Io
b. Europa
c. Ganymede
d. Callisto
[Ques. 4] The mathematical form of Coulomb's law is similar to that of
a. the second law of thermodynamics.
b. the second law of motion.
c. Kepler's second law.
d. the law of gravitation.
[Ques. 5] The spacing between reflecting planes in a crystal is 2.82 1010 m. A beam of X-rays is strongly reflected at an angle of 160 with the crystal face. What is the wavelength of the X-rays?
[Ques. 6] Which of the following is Jupiter's largest moon?
a. Io
b. Europa
c. Ganymede
d. Callisto
[Ques. 7] Electric charge is measured in units of
a. coulombs.
b. watts.
c. volts.
d. newtons.
[Ques. 8] Light strikes a flat water surface (n = 1.333) at the Brewster angle. Calculate the angle between the reflected and the refracted ray.
[Ques. 9] Which of the Jovian planets has the most moons?
a. Jupiter
b. Saturn
c. Uranus
d. Neptune
[Ques. 10] A double convex lens has a focal length of 0.10 m. An object 0.05 m high is placed 0.15 m from the lens surface on the principal axis. Sketch a ray diagram and give the characteristics of the image.
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