Current evidence suggests that some massive jovian planets orbit at close orbital distances to their stars. How do we think these planets ended up on these close orbits?
A) These planets migrated inward after being born on orbits much farther from their stars.
B) These planets were able to form close to their stars because their solar nebulas were cold in temperature.
C) Despite their large masses, these planets are made of rock and metal and therefore could form in their inner solar systems.
D) These planets were captured from other solar systems.
A) These planets migrated inward after being born on orbits much farther from their stars.
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If the Earth rotated more slowly so that the length of a day was longer, the radius of a communications satellite in synchronous orbit would be ________.
Fill in the blank(s) with the appropriate word(s).
A beam of light of wavelength 610 nm passes through a slit that is 1.90 µm wide. At what the angle away from the centerline does the second dark fringe occur?
A) 39.9° B) 12.2° C) 18.7° D) 9.35° E) 11.4°
A vertical wire carries a current straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on this current?
A) down B) north C) south D) east E) west
Weight can be simulated in a space vehicle if the vehicle is
A) falling. B) in a circular orbit about Earth. C) rotating. D) none of the above