A high tide is occurring at Charleston, South Carolina (80°W, 33°N). At approximately what other longitude is a high tide occurring?
100°E
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Overall, current data suggest that ________ of stars are orbited by one or more planets.
A) at least about 70% B) approximately 1% C) approximately 20% D) no more than 30%
Two ice skaters push off against one another starting from a stationary position
The 45.0-kg skater acquires a speed of 0.375 m/s. What speed does the 60.0-kg skater acquire? Assume that any other unbalanced forces during the collision are negligible. A) 0.500 m/s B) 0.281 m/s C) 0.375 m/s D) 0.750 m/s E) 0.000 m/s
What was most surprising about SN1987A?
A) Its pulsar appeared within weeks of the explosion. B) The supernova was luminous enough to see with the naked eye. C) The supernova was not even in our own Galaxy. D) The parent star was a blue supergiant, much like Deneb or Rigel. E) It did not produce the flood of neutrinos our models had led us to expect.
A small metal sphere is suspended from the conducting cover of a conducting metal ice bucket by a non-conducting thread. The sphere is given a negative charge before the cover is placed on the bucket. The bucket is tilted by means of a non-conducting material so that the charged sphere touches the inside of the bucket. Which statement is correct?
a. The negative charge remains on the metal sphere. b. The negative charge spreads over the outside surface of the bucket and cover. c. The negative charge spreads over the inside surface of the bucket and cover. d. The negative charge spreads equally over the inside and outside surfaces of the bucket and cover. e. The negative charge spreads equally over the sphere and the inside and outside surfaces of the bucket and cover.