The ecliptic is tilted by ________ degrees relative to the Celestial Equator.
A. 32.5
B. 11
C. 66.5
D. 23.5
E. 25
Answer: D
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Observations and stellar evolution models indicate that the central star of a planetary nebula finally must contract and become a _____
A) yellow giant B) white dwarf C) red giant D) black dwarf
Kepler's Laws: The average distance from Earth to the sun is defined as one astronomical unit (AU). If an asteroid orbits the sun in 1/3 of a year in a circular orbit, the asteroid's distance from the sun is closest to
A. 0.19 AU. B. 0.48 AU. C. 2.1 AU. D. 5.2 AU. E. 0.33 AU.
A coil with a self-inductance of 6.0 H has a constant current of 2.0 A flowing through it for 2.0 s. What is the emf induced in this coil?
A) 6.0 V B) 12 V C) 0.0 V D) 4.0 V E) 8.0 V
An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth
The astronaut's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year.) According to the astronaut, how long does the trip take? A) 14.4 y B) 15.0 y C) 9.34 y D) 4.20 y E) 22.7 y