During a total solar eclipse, which occurs?
A. the Moon passes just outside the Earth’s umbra
B. the Moon’s umbra touches the Earth
C. the Moon’s umbra just misses the Earth
D. the Moon moves through the Earth’s umbra
Answer: B. the Moon’s umbra touches the Earth
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You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?
a. 45° b. 23.4° c. 39° d. 51° e. The answer depends on the day of the year.
Newton's second law focuses on
A) speed. B) velocity. C) acceleration. D) none of the above
What form or forms of energy does a falling elastic ball have just before it is dropped from some height above the floor [see figure above]?
A) Elastic only B) Gravitational only C) Kinetic and gravitational D) Kinetic only E) Kinetic and gravitational and elastic
The type of EM radiation that has wavelength just a bit shorter than that of visible light is
a. ultraviolet. b. infrared. c. x-ray. d. microwave. e. gamma ray.