On the autumnal equinox, the Sun sets ________.
A. south of west
B. south of east
C. due east
D. due west
E. north of east
Answer: D
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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.
The 100 Year Starship initiative aims to devise a plan for sending a crewed spacecraft to a nearby star
A) at a cost of less than a 100 billion US dollars B) with a travel time of one century or less C) within the next century D) a hundred light years distant
At a point in space where the magnetic field is measured, the magnetic field produced by a current element
a. points radially away in the direction from the current element to the point in space. b. points radially in the direction from the point in space towards the current element. c. points in a direction parallel to the current element. d. points in a direction parallel to but opposite in direction to the current element. e. points in a direction that is perpendicular to the current element and perpendicular to the radial direction.
Uniform Electric Fields: A battery maintains the electrical potential difference of 6.0-V between two large parallel metal plates separated by 1.0 mm. What is the strength of the electric field between the plates?
A. 6.0 V/m B. 600 V/m C. 6000 V/m D. zero