A tuning fork is sounded above a resonating tube (one end closed), which resonates at a length of 0.80 m and again at 1.40 m. What is the frequency of the fork when the speed of sound is taken to be 340 m/s?
a. 243 Hz
b. 155 Hz
c. 425 Hz
d. 567 Hz
e. 748 Hz
b
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The birth place of stars: Discuss the observational evidence that supports the idea that most stars are formed in groups from large clouds of interstellar gas and dust
What will be an ideal response?
Why do the patterns of the stars in our sky look the same from year to year?
A) because the stars in the constellations are so far away B) because the stars in the constellations are not moving C) because the stars in the constellations all move at the same speeds and in the same directions, so they don't change their relative positions D) because the stars in the constellations typically move so slowly – typically about the speed of a snail – that their motions are not noticeable
How might light be captured?
A: Fish net. B: Hubble Space Telescope. C: Hobby-Eberly Microscope. D: Hester gyroscope. E: Nuclear magnetic resonance spectograph.
The heaviest element produced by stars or in supernovae is silicon
Indicate whether the statement is true or false