An object is placed 60 cm from a convex lens of focal length 10 cm. What is the magnification?
A)
-0.10
B)
0.10
C)
0.15
D)
0.20
E)
-0.20
E
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The interface between epoxy and glass fibers in fiberglass is a(n) _____________boundary.
Fill in the blank(s) with the appropriate word(s).
A bucket of water with total mass 24.0 kg is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. A crank with a turning radius of 0.35 m is attached to the end of the cylinder. What minimum force directed perpendicular to the crank handle is required to just raise the bucket? (Assume the rope's mass is negligible, that the cylinder turns on
frictionless bearings, and that g = 9.8 m/s2.) a. 1 600 N b. 3.4 N c. 34 N d. 670 N e. 4.1 N
What type of lens is used to make a magnifying glass?
A) converging B) diverging C) Either type would work equally well.
Sound is a(n)
a. longitudinal wave. b. electromagnetic wave. c. transverse wave. d. standing wave.