What principle is responsible for the fact that certain sunglasses can reduce glare from reflected surfaces?
A)
refraction
B)
reflection
C)
polarization
D)
diffraction
E)
total internal reflection
C
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In the production of sediment from fresh rock, which usually occurs first, erosion or weathering?
What will be an ideal response?
Consider the first major feature (orderly motions). Which of the following correctly describe patterns of motion in our solar system?
A. Major moons generally have polar orbits, meaning orbits that take them over the north and south poles of the planet they orbit. B. All the planets orbit the Sun in nearly the same plane. C. The outer planets are so large that they nearly collide with each other on each orbit. D. Inner planets orbit the Sun in the opposite direction from the outer planets. E. The Sun and most of the planets rotate in the same direction that the planets orbit. F. Planets have nearly circular orbits.
A proton with mass 1.67 × 10^?27 kg moves in an accelerator with a speed of 0.780c. What is its total energy? (c = 3.00 × 10^8 m/s)
a. 1.50E–10 J b. 3.90E–10 J c. 2.40E–10 J d. 7.51E–19 J e. 1.28E–18 J
At which place on the Earth will you weigh less?
A. at the North Pole B. at the equator C. at the South Pole D. You weigh the same at all of these places.