An efficient wood-burning stove has an advantage over an open fireplace primarily because
a. combustion air intake is limited
b. higher temperatures are reached
c. creosote buildup is reduced
d. most heat transfer occurs by radiation
a
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Thin Lenses: A convex lens has focal length f. If an object is placed at a distance between f and 2f from the lens on the principal axis, the image is located at a distance from the lens
A. of 2f. B. between f and 2f. C. of f. D. that is greater than 2f. E. of infinity.
The Sun's ________ transports material from the Sun's equator to its poles and back to the equator
Fill in the blank(s) with correct word
The one term of the Drake equation whose value remains completely unknown is the average lifetime of a technological civilization
Indicate whether the statement is true or false
What causes erosion?
a. wind b. water c. glacier ice d. all of the other choices.