The amount of current in an LED bulb rated 10.5W 120V is
A) less than 1 A.
B) about 1 A.
C) more then 1 A.
Answer: A
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According to the nebular theory, what are asteroids and comets?
A) leftover planetesimals that never accreted into planets B) chunks of rock or ice that condensed long after the planets had formed C) the shattered remains of collisions between moons D) the shattered remains of collisions between planets E) chunks of rock or ice that have been expelled from the planets by volcanoes
The plane in which almost all planets orbit the Sun is called the:
A) equator of the solar system. B) ecliptic. C) equant. D) node. E) galactic plane.
The source of all magnetism is
A) tiny pieces of iron. B) tiny domains of aligned atoms. C) ferromagnetic materials. D) moving electric charge. E) none of the above
Optical fibers work because of dispersion of light
a. True b. False Indicate whether the statement is true or false