Briefly describe the three most commonly used methods of indirect planet detection
What will be an ideal response?
The Doppler technique measures the periodic change in velocity of a star due to the motion of a planet around it. The astrometric technique measures the periodic change in the position of a star on the sky as it responds to the motion of a planet around it. The transit technique measures the dip in star brightness as the planet moves in front of the stellar disk.
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The splitting of a large nucleus into two smaller nuclei upon absorbing a neutron is
a. nuclear fission b. nuclear fusion c. neutron activation d. nuclear emission e. beta decay
Stars that are visible in the local sky on any clear night of the year, at any time of the night, are called ________
A) seasonal B) bright C) celestial D) circumpolar
Interferometry
a. is used to improve the resolving power. b. decreases the chromatic aberration of a telescope. c. works only for large x-ray and ultraviolet telescopes. d. requires that radio telescopes be within a few hundred feet of each other. e. none of the above
A ball is rolled horizontally off a table with an initial speed of 0.18 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s. What is the height of the table? Note: g = 9.8 m/s2 and air resistance is negligible
a. 0.11 m c. 0.33 m b. 0.22 m d. 0.44 m