Two windowpanes are being compared for their heat conduction. The second windowpane has twice the width, twice the height, and twice the thickness of glass of the first windowpane.How would the heat flow through the second windowpane compare to that of the first
a. They both would have the same amount.
b. The second one would have double that of the first.
c. The second one would have quadruple that of the first.
d. The second one would have eight times that of the first.
B
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You find a mysterious rock on the ground and determine that 60% of its uranium-235 has been converted into lead-207. What is the most likely origin of the rock, based on its radiometric age?
A) It's older than our solar system, so it must have come from another solar system. B) It's a meteorite dating back to the formation of the solar system. C) It's a volcanic rock nearly a billion years old. D) It was just formed this year during the eruption of a nearby volcano.
Briefly explain the purpose of the equation Number of Civilizations = Np × flife × fcivilization × fnow
What will be an ideal response?
In contrast to the plum-pudding model of the atom, Rutherford's model:
a. was first to explain atoms emitting discrete frequencies. b. had the positive charge concentrated in a small region. c. eliminated radiation from accelerating charges. d. had the positive charge spread uniformly through the atom.
in the jet’s direction of motion, which part of the airplane becomes negatively charged?
A. Its nose B. Its tail C. Its top D. Its bottom E. Its left wing F. Its right wing T. (No part becomes charged.)