What is the wave speed in a brass wire with a radius of 0.500 mm stretched with a tension of 125 N? The density of brass is 8.60 × 103 kg/m3
A) 0.121 m/s B) 136 m/s C) 100 m/s D) 500 m/s E) 68.8 m/s
B
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The light-gathering power of a telescope is directly proportional to
a. the diameter of the primary mirror or lens. b. the focal length of the primary mirror or lens. c. the ratio of the focal lengths of its primary mirror or lens and its eyepiece. d. the length of the telescope tube. e. the diameter of the eyepiece.
As the illuminated part of the Moon grows larger from new to full, it is said to "wane"
a. True b. False Indicate whether the statement is true or false
Which of the following stars has a spectrum that peaks at the highest frequency?
A) a blue star B) a red star C) a yellow star
How is energy transfer from the solar interior to surface similar to a process in Earth's atmosphere?
What will be an ideal response?