You wish to suspend a sculpture by a single wire high over the atrium of a new art gallery. You wish the state to rotate in the breeze. Your architect has given you a choice of several wires that you could use. Which will allow the sculpture to rotate most easily? The shear modulus of copper is 4.2x1010 N m-2 and that of steel is 8.4x1010 N m-2.
A)Solid copper wire, 1 mm in radius.
B)Hollow copper wire, inside radius 1 mm, outside radius 1.5 mm.
C)Solid steel wire, 0.8 mm in radius.
D)Hollow steel wire, inside radius 0.8 mm, outside radius 0.9 mm.
E)All the other answers are equally good.

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The Answer of You wish to suspend a sculpture by a single wire high over the atrium of a new art gallery. You wish the state to rotate in the breeze. Your architect has given you a choice of several wires that you could use. Which will allow the sculpture to rotate most easily? The shear modulus of copper is 4.2x1010 N m-2 and that of steel is 8.4x1010 N m-2.
A)Solid copper wire, 1 mm in radius.
B)Hollow copper wire, inside radius 1 mm, outside radius 1.5 mm.
C)Solid steel wire, 0.8 mm in radius.
D)Hollow steel wire, inside radius 0.8 mm, outside radius 0.9 mm.
E)All the other answers are equally good.

You Wish to Suspend a Sculpture by a Single Wire