A student adds two vectors with magnitudes of 200 and 70 . Which one of the following is the only possible choice for the magnitude of their sum?
a. 100 b. 280
c. 200 d. 70
c
Physics & Space Science
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At what Fahrenheit temperature are the Kelvin and Fahrenheit temperatures numerically equal?
Physics & Space Science
The eighteenth-century naturalist Carolus Linnaeus is known for creating:
a. the theory of natural selection b. a system for naming and classifying organisms c. the biological species concept d. the first microscope e. the scientific method
Physics & Space Science
Before Einstein, scientists thought that the substance that was "waving" when a light wave was transmitted was
A) phlogisten. B) air. C) ether. D) plasma. E) They didn't think any material substance was waving.
Physics & Space Science
A certain kind of lightbulb carries 0.5 amperes of current when connected to a 120 volt AC circuit. What is its power rating?
A. 75 W B. 240 W C. 100 W D. 60 W
Physics & Space Science