Quasars appear to have very large redshifts, and are receding at nearly the speed of light
Indicate whether the statement is true or false
TRUE
You might also like to view...
To create the above spectra, which of the following is NOT true?
a. A dense gas is excited and the light produced is over all wavelengths.
b. A low-density gas is excited and the light produced is over discrete wavelengths.
c. Light from a low-density gas passes through a warm, dense gas and the light that is produced is at all wavelengths except for a few discrete wavelengths.
d. All of the other choices are not true.
Which of the following best explains why we can rule out the idea that planets are usually formed by near-collisions between stars?
A) Studies of the trajectories of nearby stars relative to the Sun show that the Sun is not in danger of a near-collision with any of them. B) Stellar near-collisions are far too rare to explain all the planets now known to orbit nearby stars. C) A near collision might have created planets, but it could not have created moons, asteroids, or comets. D) A near collision should have left a trail of gas extending out behind the Sun, and we see no evidence of such a trail.
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. A horizontal force of 32 N is applied to the 5.0-kg box pushing it against the 3.0-kg box, and, as a result, both boxes slide along the floor
How hard do the two boxes push against each other? A) 12 N B) 20 N C) 24 N D) 32 N E) 0 N
Glaciers are thinning in high mountain regions, but there is no evidence of thinning on the Antarctic, Arctic, and Greenland Ice Sheets
What will be an ideal response?