Wilhelm Roentgen discovered
a. X-rays.
b. gamma rays.
c. radio waves.
d. microwaves.
a
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Why are neutrinos so difficult to detect?
A) They have a tendency to pass through just about any material without any interactions. B) They are extremely rare. C) They have no mass. D) No one knows; this is the essence of the "solar neutrino problem."
Suppose that a certain saber-toothed-tiger contained one gram of 14C [half-life 6000 years] when it died. The approximate 14C content of the remains of this tiger 24,000 years later would be
A) zero grams. B) 1/8 gram. C) 1/32 gram. D) 1/16 gram. E) impossible to predict.
What is the result of 2.43 ÷ 4.561?
A) 5.3278 × 10-1 B) 5.328 × 10-1 C) 5.33 × 10-1 D) 5.3 × 10-1 E) 5 × 10-1
Samus is exploring the planet Zebes in the star system Metroid Prime (where the laws of physics are the same as on Earth and in our universe) in a ship moving at constant velocity. She turns on her headlamps as she encounters some strange fog. Ridley, the villain lying in wait, is at rest with respect to Samus. The speed of the light from Samus's headlamps as measured by Ridley depends most
importantly on