A student attaches a length of nylon fishing line to a fence post. She stretches it out and shakes the end of the rope in her hand back and forth to produce waves on the line. The most efficient way for her to increase the wavelength is to
a. increase the tension on the hose and shake the end more times per second.
b. decrease the tension on the hose and shake the end more times per second.
c. increase the tension on the hose and shake the end fewer times per second.
d. decrease the tension on the hose and shake the end fewer times per second.
e. keep the tension and frequency the same but increase the length of the hose.
c
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If you need 3.01 × 1023 molecules of sucrose, how many liters of a 4.00 molar solution would you need?
A) 0.125 L B) 0.250 L C) 4.00 L D) 1.00 L E) none of the above
What is the current flowing through the 4-? resistor?
a.
1 A
b.
2 A
c.
3 A
d.
6 A
Most active galactic nuclei are found at large distances from us, with relatively few nearby. What does this imply?
A) Active galactic nuclei exist tend to become less active as they age. B) Supermassive black holes existed only when the universe was young, and no longer exist today. C) Active galactic nuclei can form only at large distances from the Milky Way. D) The jets seen in many active galactic nuclei must cause them to move far away from us.
What features of the telescopic view of the Andromeda Galaxy, M-31, are also visible to the naked eye for our similar Galaxy?
What will be an ideal response?