What did the Michelson—Morley experiment demonstrate?
A) The speed of light that we observe is not affected by Earth's motion around the Sun.
B) The speed of light that we observe is different depending on the time of year.
C) The speed of light that we observe is not affected by the gravity of the Moon.
D) The speed of light that we observe is not affected by the medium in which it travels.
A) The speed of light that we observe is not affected by Earth's motion around the Sun.
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A pendulum clock has a pendulum shaft made of aluminum which has a coefficient of linear expansion of 24.0 × 10-6 K-1. At 22°C the period of swing of the pendulum is 1.00 s
If the temperature is reduced to 5°C, how much time does the clock gain or lose in one day? A) It gains 18 s per day. B) It loses 18 s per day. C) It gains 9.0 s per day. D) It loses 9.0 s per day. E) It neither gains nor loses time.
Which statement best describes the greenhouse effect? a. infrared radiation escapes into space
b. ultraviolet radiation enters a planet's atmosphere producing a green haze c. visible radiation is trapped by the atmosphere. d. infrared radiation is trapped by the atmosphere. e. oxygen escapes from the atmosphere.
The condition for total internal reflection can be predicted from Snell's law since
A) the index of refraction of glass is about 1.5. B) the index of refraction of plastic is about 1.5. C) the value of tangent can be 1.0. D) the maximum value of the sine is 1.0. E) the maximum value of the sine is 1.5.
You drop a stone down a well. You hear the splash 1.63 s later. How deep is the well? The speed of sound in air is 343 m/s
A) 6.96 m B) 20.2 m C) 12.5 m D) 18.8 m E) 20.0 m