Which of the following methods uses astrometry to detect extrasolar planets around other star systems?
A) detection of Doppler shifts in the spectra of the parent stars
B) detection of reflected starlight
C) detection of brightness changes in a star as a planet passes in front of it
D) regular changes in the positions of the parent stars with respect to more distant stars as they move across the sky
D
You might also like to view...
The highest temperatures of volcanic lava on Io that are
A) similar to that of hot springs on Earth. B) similar to volcanic lava on Earth. C) similar to the surface temperature of Venus. D) far hotter than any earthly volcano. E) just barely hot enough to melt water ice.
Find Brewster's angle for light in air that is reflected from the top of a water surface. The index of refraction of the water is 1.33
A) 53.1° B) 36.9° C) 56.3° D) 60.2° E) 90.0°
A small 1.4-N stone slides down a frictionless bowl, starting from rest at the rim. The bowl itself is a hemisphere of radius 75 cm. Just as the stone reaches the bottom of the bowl, how hard is the bowl pushing on it?
A) 0.70 N B) 1.4 N C) 2.8 N D) 4.2 N E) 5.6 N
What is a hydrocarbon?
A) It is a molecule composed of carbon and hydrogen only. B) It is a wet carbon atom. C) It is any organic molecule. D) It is a molecule derived from hydrogen synthesis. E) none of the above