Which of the following forms of electromagnetic radiation has a longer wavelength than visible light?
A) Gamma rays
B) Ultraviolet radiation
C) Infrared radiation
D) X-rays
C
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Eternal Inflation refers to
A) the possibility that our universe is only a patch of a greater universe and that the process of universe spawning will continue forever. B) the observation that cosmic inflation could eventually curve back in on itself, causing its opposite: the compression of space. C) cosmic inflation inflating itself such that its own inflation is self-generating. D) the presence of a distinct beginning of time.
Magnetic Field of a Current Loop: A current-carrying loop of wire lies flat on a horizontal tabletop. When viewed from above, the current moves around the loop in a counterclockwise sense. For points on the tabletop outside the loop, the magnetic field lines caused by this current
A. circle the loop in a clockwise direction. B. circle the loop in a counterclockwise direction. C. point straight up. D. point straight down.
An astronaut measures her mass by means of a device consisting of a chair attached to a large spring. The period of oscillation she undergoes when set into motion is used to determine her mass. If the spring constant is 1250 N/m and 27 seconds is required for her to undergo 10 full oscillations what is the mass of the astronaut and chair?
A. 231 kg B. 537 kg C. 85.5 kg D. 171 kg
A charged particle having electric charge Q=4.0 e enters a region of magnetic field 1.2 T at an angle of 
relative to the magnetic field direction. If the speed of the particle upon entering the region is 2.8 x 104 m/s and the magnitude of the force on it is 1.3 x 10-14 N, what is the angle 
?
a. 
b. 
c. 
d. 