The parallactic angle is the total shift observed over a six-month interval
Indicate whether the statement is true or false
FALSE
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The radiation emitted from a star has a maximum intensity at a wavelength of 500 nm. What is the temperature of this star?
a. 6,000 K b. 5,000 K c. 1.5 × 10^9 K d. 500 K e. 10,000 K
Angular Quantities: The diameter of the Moon is 3.47 × 106 m, and it subtends an angle of 0.00904 rad when viewed from the surface of Earth. How far is the Moon from Earth?
Fill in the blank(s) with the appropriate word(s).
A bumper car is moving at constant velocity when another bumper car starts to push on it with a constant force at an angle of 60 degrees with respect to the first car's initial velocity. The second bumper car continues pushing in exactly that direction for some time. What is most likely to happen is that
a. the first car will stop moving. b. the first car will move in the direction of the force. c. the first car's velocity will increase in magnitude but not change direction. d. the first car's velocity will gradually change direction more and more toward that of the force while increasing in magnitude. e. the first car's velocity will gradually change direction more and more toward that of the force while decreasing in magnitude.
A typical galaxy like our Milky Way galaxy contains
a. primarily planets. b. gas only. c. stars (some with planets), gas, and dust. d. a single star and planets. e. thousands of superclusters.