Measuring the Doppler shift of material at various distances from the center of a galaxy can be used to construct a(n) ________________ for that galaxy
Fill in the blank(s) with correct word
rotation curve
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If the polarizing angle for diamond is 67.5°, what is the index of refraction of this material?
a. 2.00 b. 2.20 c. 2.41 d. 2.65
Two identical springs with spring constant 50 N/m support a 5.0-N weight as in the picture below. What is the tension in spring A?
?
?
a.
1.45 N
b.
2.50 N
c.
2.89 N
d.
3.75 N
e.
5.00 N
The bright light at the center of a shadow cast by a penny
1.supports the hypothesis that light can be viewed as rays traveling in straight lines. 2.results from the re-reflection of the diffraction pattern cast by the penny. 3.is the result of the penny's shininess; it acts like a mirror providing a second source to create an interference pattern. 4.is the central maxima of the interference pattern caused by the diffraction effects around the penny.
What is the potential difference VB ? VA when I = 0.50 A in the circuit segment shown below?
a.
+28 V
b.
+2.0 V
c.
?28 V
d.
?2.0 V
e.
+18 V