Which of the following statements comparing open and globular star clusters is not true?
A) Stars in open clusters are relatively young while stars in globular clusters are very old.
B) Open and globular clusters each typically contain a few hundred stars.
C) For both open and globular clusters, we can assume that all the stars in a particular cluster are about the same age.
D) Open clusters are found only in the disk of the galaxy while globular clusters may be found both in the disk and the halo of the galaxy.
B
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What will be an ideal response?
Transverse waves are traveling on a 1.00-m-long piano string at 500 m/s. If the points of zero vibration occur at one-half wavelength (where the string is fastened at both ends), find the frequency of vibration
a. 250 Hz b. 500 Hz c. 1000 Hz d. 2000 Hz e. 2500 Hz
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A) electroscope leaves will move farther apart B) the rod will lose its charge C) electroscope leaves will tend to collapse D) electroscope will become discharged E) nothing noticeable will happen