What is not part of the radial velocity method?
A: A star moving a little towards and a little away from us
B: A planet passing in front of its host star
C: A star making a small orbit because of the planet's influence
D: A detected redshift from a star
E: A detected blueshift from a star
Answer: B: A planet passing in front of its host star
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How much longer does the Sun have to live?
A: About a month- no need to study for finals! B: About 2 years- are you going to graduate in time? C: About a million years- not too much to worry about. D: About 5.5 billion years- what is humanity going to be like? E: The Sun won't die- how silly is that?
Per unit area (such as a square centimeter), a B star whose surface temperature is 10,000 K will put out how much radiation compared to an O star whose surface temperature is 30,000 K?
A) 81 times as much B) 9 times as much C) 1/81 as much D) 1/9 as much E) 1/3 as much
When the frequency of the source of a water wave increases, the speed of the waves traveling in the water increases
Indicate whether the statement is true or false
During a collision with a wall, the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the wall. If the time the ball was in contact with the wall was 60
0 ms, what was the magnitude of the average force applied to the ball? A) 40.0 N B) 107 N C) 16.7 N D) 26.7 N E) 13.3 N