Frost wedging is a form of
a) terminal erosion.
b) physical weathering.
c) chemical weathering.
d) slow mass wasting.
b
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In stress relaxation, a constant _________is applied to the specimen.
Fill in the blank(s) with the appropriate word(s).
Thin Lenses: The image formed by a single concave lens
A. is always real. B. is always virtual. C. could be real or virtual, depending on whether the object distance is smaller or greater than the focal length. D. could be real or virtual, but is always real when the object is placed at the focal point. E. is always inverted.
A baseball is moving in the air along the customary parabola. Ignoring air drag, where is the force on the baseball zero?
a. at the top of the parabola c. where it is about to impact b. just when it has started upward d. nowhere