The core of the Sun is
A) at the same temperature and density as its surface.
B) composed of iron.
C) constantly rising to the surface through convection.
D) at the same temperature but much denser than its surface.
E) much hotter and much denser than its surface.
E
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Increasing the air temperature inside an organ pipe, neglecting any expansion of the pipe, will ________ the frequency of the fundamental tone.
Fill in the blank(s) with the appropriate word(s).
Estimation: A marathon race is 26 mi and 385 yd long. Estimate how many strides would be required to run a marathon. Assume a reasonable value for the average number of feet/stride.
A. 4.5 × 104 strides B. 4.5 × 103 strides C. 4.5 × 105 strides D. 4.5 × 106 strides
Which position in this diagram represents Earth on the day that we have the longest amount of daylight in the continental United States?
A) 1 B) 2 C) 3 D) 4
Which of the following does NOT represent a property of carbon nanotubes useful in nanotechnology application?