Note the expression: y = A/x2 . Which statement is most consistent with this expression?
a. y is less than A
b. if x is doubled, y is multiplied by a factor of four
c. if x is halved, y is multiplied by a factor of four
d. y is greater than x
C
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Globular cluster stars are ________ in heavy elements than those in open clusters
Fill in the blank(s) with correct word
The general formula R-X is that of
a. an amine. b. an alkyl halide. c. an alcohol. d. none of these
Kirchhoff's Rules: For the circuit shown in the figure, R1 = 50 ?, R2 = 20 ?, R3 = 35 ?, R4 = 10 ?, R5 = 68 ?, I1 = 0.111 A, I2 = 0.142 A, and the batteries are ideal.(a) Determine V1 and V2.(b) What is the potential difference across R4?
What will be an ideal response?
Which of the following best describes Fermi's Paradox?
A) Galactic civilizations seem forbidden by the laws of physics. B) Interstellar travel is possible yet would take an infinite amount of time because of relativistic time dilation. C) We would be unable to detect an Earthlike planet even at a distance of a few light-years. D) Reasonable assumptions predict that a galactic civilization should have already arisen in the Milky Way, yet we have absolutely no evidence for it. E) The Drake equation predicts that there should be no intelligent life in the Milky Way, yet we exist.