Most molecules found in the giant molecular clouds are based on silicon
Indicate whether the statement is true or false
FALSE
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Which of the following objects is experiencing Earth's gravitational force?
A. a skydiver falling under the force of gravity B. an airplane taking-off C. a boat floating in water D. All of these choices are correct. E. Only an airplane taking-off and a skydiver falling under the force of gravity above.
Stars much more luminous than the Sun have
A) narrower habitable zones, decreasing the odds of finding habitable planets and lifetimes too short for life to appear B) wider habitable zones, increasing the odds of finding habitable planets but lifetimes too short for life to appear C) narrower habitable zones, decreasing the odds of finding habitable planets but much longer lifetimes allowing life to appear and evolve D) wider habitable zones, increasing the odds of finding habitable planets and much longer lifetimes allowing life to appear and evolve
A 50-W light bulb is in a socket supplied with 140 V. What is the current in the bulb?
a. 0.36 A b. 2.8 A c. 90 A d. 7 000 A e. 3.8 A
The law of reflection, as well as the law of refraction, can be derived using Huygens' principle
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