A lamp rated at 120W 120V has a filament resistance of
A) 1 ohm.
B) 60 ohms.
C) 100 ohms.
D) 144 ohms.
E) none of the above
Answer: E
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What does the exclusion principle say?
A) Two fermions cannot occupy the same quantum state at the same time. B) No two particles of any type can ever occupy the same quantum state at the same time. C) If a particle has a precisely defined position it is excluded from having a precisely defined momentum. D) The laws of quantum mechanics are excluded from our common sense.
Compared with stars in the disk, orbits of stars in the halo
A) are relatively uniform to each other. B) are elliptical, with random orientation. C) are elliptical but orbiting in the same direction. D) do not have to be around the galactic center. E) do not have to pass through the plane of the galaxy.
Which of the following would not increase the radius of the dark fringes caused by the Newton's Rings effect?
1.increase the radius of curvature of the lens and decrease its index of refraction 2.increase the wavelength of the light and the radius of curvature of the lens 3.use a lens with a larger index of refraction and smaller radius of curvature 4.use a lens with a smaller index of refraction and increase the wavelength of the light
Who was the first to propose solar system formation with gravity as a key component of the hypothesis?
a. Isaac Newton b. René Descartes c. Pierre-Simon de Laplace d. Georges-Louis de Buffon e. Emanuel Swedenborg