Estimate of the experimental uncertainty
Suppose you were the first to measure the value of some physical constant experimentally. How would you provide an estimate of the experimental uncertainty?
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The mass of a water molecule is 2.99 10-26 kg. If the mass of a person is 63 kg, estimate the number of water molecules in that person.
A block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. It has a mass of 213 g. When placed in water, the block sinks. What volume of water did it displace?
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When a ceiling fan rotating with an angular speed of 2.50 is turned off, a frictional torque of 0.130 slows it to a stop in 20.5, What is the moment of inertia of the fan?
Will any of your readers be so kind as to inform me whether such experiments have already been tried? And, secondly, what class of seeds, or particular species, they have any reason to suppose would be eminently liable to be killed by sea-water?
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A playground merry-go-round of radius R = 2.20 m has a moment of inertia I = 270 kg·m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. Facing the axle, a 25.0 kg child hops onto the merry-go-round and manages to sit down
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