Suppose that the plank has a mass 15 kg, and we place 10 kg on the left side at a distance 2.00 m from the fulcrum, and a mass 20 kg on the right side at a distance 1.00 m form the fulcrum (so that the plank is balanced). What will be the force exerted by the fulcrum on the plank

a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be?

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it doesn't. it was imagined up in the middle ages.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

the doppler effect is used by weather forecasters to measure 

moving clouds