A stick is moving along the x-axis at 90%c. A person riding with the stick sees it inclined at 45.° with respect to the x-axis. Observers in the rest frame see the stick making what angle with respect to the x-axis?
A) 79.°
B) 66.°
C) 53.°
D) 45.°
E) 88.°
B
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Astronomers no longer build large observatories in populated areas in order to avoid _______________
Fill in the blank(s) with correct word
In order for a color to be visible in thin film interference, the wavelength of that color must
A. Satisfy the destructive interference conditions B. Satisfy the constructive interference conditions C. Be smaller than the thickness of the film D. Be larger than the thickness of the film
What type of lava does a shield volcano have?
What will be an ideal response?
In x-ray machines, electrons are subjected to electric fields as great as 6.0 × 10^5 N/C. Find an electron's acceleration in this field. (me = 9.11 × 10^?31 kg, e = 1.6 × 10^?19 C)
a. 1.1E+17 m/s2 b. 3.4E+13 m/s2 c. 8.7E+10 m/s2 d. 2.9E+8 m/s2 e. 4.1E+13 m/s2