How many significant figures does the number 3 600 have?
a. 1
b. 2
c. 3
d. 4
e. One cannot tell with certainty when the number is written in the given form, but it will be one of the other given answers.
e
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Radiation pressure: The intensity of solar radiation near the earth is 1.4 kW/m2. What magnitude force does this radiation exert when it strikes at right angles to a 5.0-m2 perfectly reflecting solar panel of an artificial satellite orbiting the earth? (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
If someone somehow added a lot more hydrogen and helium to the Sun (say 50% more than it has now), what would happen to it?
A) Its nuclear reactions would slow down because its heavy element abundance would be relatively less. B) It would increase in size and float away. C) It would explode as a supernova. D) It would cease to exist as a star because it would be too diffuse and fluffy. E) It would begin to evolve much more quickly than it is now.
The ________ equation was written to assess the probabilities of technological, intelligent life existing in the Galaxy
Fill in the blank(s) with correct word
Doubling the potential across a given capacitor causes the energy stored in that capacitor to
A) reduce to one-half. B) double. C) quadruple. D) reduce to one-fourth.