The person who first explained the photoelectric effect was
a. Max Planck
b. Albert Einstein
c. Neils Bohr
d. Erwin Schroedinger
e. Werner Heisenberg
B
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Why would anyone be interested in mining material from an asteroid?
What will be an ideal response?
The reason that most extrasolar planets are found close to their parent stars is
A) the planets reflect more light the closer they are to the star. B) more of the starlight is blocked by the planet when it transits the star. C) the amount and frequency of the star's motion are both higher. D) the closer to a star, the hotter and therefore brighter the planet is. E) planets that are close to a star are heated up and therefore larger.
Of all forms of electromagnetic energy, ________ radiation gives us the least access to our entire Milky Way Galaxy
A) ultraviolet B) visible light C) infrared D) radio E) X-ray
Three resistors with values R1, R2 and R3, respectively, are connected in parallel. Which of the following expresses the total resistance, RT, of the three resistors when connected in parallel?
a. RT = R1 + R2 + R3 b. RT = (1/R1 + 1/R2 + 1/R3) c. RT = R1 = R2 = R3 d. RT = (1/R1 + 1/R2 + 1/R3)?1