Captain Jirk reports to headquarters that he left the planet Senesca 1.88 × 10^4 seconds earlier. Headquarters sends back the message: "Was that spaceship proper time?" It will be spaceship proper time if it was
a. measured by one clock fixed at one spot on Senesca. b. measured by one clock fixed at one spot on the spaceship.
c. measured by a clock on Senesca at departure and by a clock on the spaceship when reporting.
d. measured by a clock on the spaceship when departing and by a clock on Senesca when reporting.
e. calculated by dividing the distance from Senesca according to Senesca by the speed of the spaceship.
B
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The Kuiper Belt objects have orbits that
A) carry them thousands of AU beyond the Sun. B) stay out just beyond Neptune and close to the ecliptic. C) stay sixty degrees ahead of or behind Jupiter. D) cross the orbit of Mars at perihelion. E) cross the orbit of Earth at perihelion.
Which of the following indicates that the Sun must be gas from its surface to its center?
A) Its low density and high temperature B) Its limited gravitational force C) Its hot spots on the photosphere D) Its weak magnetic field and small diameter
Orbital Angular Momentum: What is the greatest magnitude of the orbital angular momentum L that you can find in a state with n = 6?
A. 5.48 
B. 5.92 
C. 6 
D. 6.48 
A light ray strikes the surface of sapphire (n = 1.77) at an angle of incidence of 
What angle of refraction results?
A. 
B. 
C. 
D. 
E. 