In astronomy, an interferometer can be used to
A) decrease the effects of light pollution in getting darker sky backgrounds.
B) yield better seeing conditions with optical telescopes.
C) increase the sensitivity of infrared telescopes to longer wavelengths.
D) speed up the processing of CCD images.
E) improve the angular resolution of radio telescopes.
E
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Which of the following instruments detects and measures radioactivity?
a. Geiger counter b. Cyclotron c. Tokamak d. Mass spectrometer
Which is an example of an asterism?
a. Andromeda b. Canis Major c. Ursa Major d. Big Dipper e. Pegasus
Some features on Mars attributed to flooding may have been caused by temporary heating events like
A) impacts B) volcanic eruptions C) lightning D) Both A and B
In an automobile collision, how does an airbag lessen the blow to the passenger? Assume as a result of the collision, the passenger stops
a. The air bag decreases the momentum change of the passenger in the collision. b. During the collision, the force from the air bag is greater than would be the force from the windshield or dashboard so the passenger cannot hit the hard objects. c. The stopping impulse is the same for either the hard objects or the airbag. Unlike the windshield or dashboard, the air bag increases the time for the slowing process and thus decreases the average force on the passenger. d. The airbag is there to insure the seatbelt holds.