The part of the visible spectrum most absorbed by water is
A) infrared.
B) red.
C) cyan.
D) all about equally.
Answer: B
You might also like to view...
It is fair to say that the position in space where you were when you began this test compared to the position in space where you are when you finish
a) is exactly the same b)separated by more then tens of thousands of miles c) is separated by several hundreds feet because of earth's slow orbit around the Sun
Breeder reactors
a. produce plutonium from 238U. b. use 238U as a fuel. c. produce 235U from 238U. d. produce 238U from 235U.
The south pole of a bar magnet is moved toward a short helical coil of wire (solenoid) along the axis of the coil. The coil has 100 turns and the ends of the coil are connected to form a closed circuit. If the coil is replaced with a single loop of the same type of wire, and the magnet is moved exactly as before, the current induced in the loop is
A. zero in both cases. B. 100 times larger. C. 100 times smaller. D. the same as in the coil.
How was Edwin Hubble able to use his discovery of Cepheids in Andromeda to prove that the "spiral nebulae" were actually galaxies external to the Milky Way?
A) From the period-luminosity relation for Cepheids, he was able to determine the distance to Andromeda. He showed that it was far outside the Milky Way Galaxy. B) He used main-sequence fitting to determine the distances to the Cepheids. He showed that Andromeda was far outside the Milky Way Galaxy. C) There are no Cepheids in the Milky Way, so his discovery proved that Andromeda had to be in another galaxy. D) As a Cepheid is a type of luminous galaxy, Hubble's discovery of Cepheids in Andromeda proved that it was a separate galaxy from the Milky Way. E) He measured the parallaxes of the Cepheids in Andromeda to determine their distances. He showed that Andromeda was far outside the Milky Way Galaxy.