Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. How large is the shift in wavelength?
A) 2 nm B) 0.2 nm C) 0.02 nm
B
Physics & Space Science
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Arrange the temperatures 40 ºF, 40 ºC, and 40 K from highest to lowest
a. 40 ºF, 40 ºC, 40 K b. 40 ºC, 40 K, 40 ºF c. 40 ºF, 40 K, 40 ºC d. 40 ºC, 40 ºF, 40 K
Physics & Space Science
To double the light-gathering power of a telescope, we need to double the diameter.
Answer the following statement true (T) or false (F)
Physics & Space Science
You drop a stone down a well that is 9.5 m deep. How long is it before you hear the splash? The speed of sound in air is 343 m/s and air resistance is negligible
A) 1.2 s B) 1.4 s C) 1.3 s D) 1.6 s E) 1.5 s
Physics & Space Science
Resistors in Combination: The resistors in the circuit shown in the figure each have a resistance of 700 ?. What is the equivalent resistance between points a and b of this combination?
A. 700 ? B. 2800 ? C. 175 ? D. 1400 ?
Physics & Space Science