The figure shows the distance versus time graph of an object
The velocity of the moving object is a non-zero constant.
a.
True
b.
False
b
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A soap bubble has an index of refraction of 1.33. What minimum thickness of this bubble will ensure maximum reflectance of normally incident 530. nm wavelength light?
What will be an ideal response?
Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore, ________
A) both stars have the same luminosity, but the apparent brightness of Star A is four times that of B) both stars have the same luminosity, but the apparent brightness of Star B is four times that of C) both stars have the same apparent brightness, but the luminosity of Star B is four times that of D) both stars have the same luminosity, but the apparent brightness of Star B is twice that of Star A
Unpolarized light is passed through polarizer 1 . The light then goes though polarizer 2 with its plane of polarization at 44.0° to that of polarizer 1 . What fraction of the intensity of the original light gets though the second polarizer?
a. 0.360 b. 0.518 c. 0.259 d. 0.720 e. 0.500
Magnetic Field of a Long Wire: A long straight wire has a constant current flowing to the right. A rectangular metal loop is situated above the wire, and also has a constant current flowing through it, as shown in the figure. Which one of the following statements is true? 
A. The net magnetic force on the rectangle is upward, and there is also a nonzero torque on the rectangle. B. The net magnetic force on the rectangle is zero, and the net torque on it is zero. C. The net magnetic force on the rectangle is downward, and there is also a nonzero torque on the rectangle. D. The net magnetic force on the rectangle is zero, but there is a nonzero torque on the rectangle. E. The net magnetic force on the rectangle is downward, and the net torque on it is zero.