A 2.0-m rope is lying on a table. You pick up one end and start raising it. How high above the table is the center of mass of the rope when half of the rope has lifted off the table?
A) 0.25 m
B) 0.50 m
C) 0.75 m
D) 1.0 m
E) 1.5 m
A
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A stable nucleus contains many protons very close to each other, all positively charged. Why do the protons not fly apart due to mutual Coulomb repulsion?
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what will be the diameter of the sun when it reaches it white dwarf stage?
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