The relative distance between the planets increase with distance from the Sun
a. True
b. False
Indicate whether the statement is true or false
True
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Time Dilation: A particle physicist observes cosmic rays creating a new particle high in the atmosphere, and the speed of this particle is measured at 99.7% the speed of light. It is unstable, and is observed to decay in an average 37.0 ?s. If this particle were at rest in the laboratory, what would be its average lifetime?
A. 2.9 µs B. 18 µs C. 5.3 µs D. 12 µs E. 4.3 µs
A beam of light in water (n = 1.33 ) enters a glass slab (n = 1.50 ) at an angle of incidence of 60.0°. What is the angle of refraction?
A) 27.5° B) 39.8° C) 60.0° D) 90.0° E) 50.2°
Which of the following statements about thermal radiation is always true?
A) A hot object emits more x-rays than a cool object. B) A hot object emits more radio waves than a cool object. C) A hot object emits more total radiation than a cool object. D) A hot object emits more total radiation per unit surface area than a cool object. E) A hot object emits less total radiation than a cool object.
The Moon's angular size ________.
A. does not change as it orbits Earth B. is higher when the Moon is closer to Earth C. is larger during eclipses than at other times D. is largest at the full moon phase and smallest at the new moon phase E. None of these choices are correct.