An object of mass m rests on a flat table. The earth pulls on this object with a force of magnitude mg. What is the reaction force to this pull?
A) The table pushing up on the object with force mg.
B) The object pushing down on the table with force mg.
C) The table pushing down on the floor with force mg.
D) The object pulling upward on the Earth with force mg.
E) The table pulling upward on the Earth with force mg.
D
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A guitar string 0.65 m long has a tension of 61 N and a mass per unit length of 3.0 g/m
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Which of the following materials is most appropriate for a design requiring a material with a permanent high intensity of magnetization?
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