A solar eclipse occurs when the

A) Sun passes into Earth's shadow.
B) Moon passes into Earth's shadow.
C) the Moon's shadow is cast on Earth.
D) none of the above


Answer: C

Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

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Indicate whether the statement is true or false

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A bucket of cement is raised by a rope at constant speed at a construction site. Compared with the force of gravity on the bucket, the upward force supplied by the rope is

A) greater. B) equal. C) less.

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A solar heating system has a 25.0% conversion efficiency; the solar radiation incident on the panels is 1000 W/m2 . What is the increase in temperature of 40.0-kg of water in a 1.00-h period by a 4.00 m2 area collector? (cw = 4186 J/kg • °C)

a. 14.3°C c. 28.7°C b. 21.5°C d. 44.3°C

Physics & Space Science