How many mass electrons has it acquired
ON a dry day, your body can accumulate static charge from walking across a carpet or from brushing your hair. If your body develops a charge of -15 microcoulombs, how many mass electrons has it acquired, what is their collective mass?
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You are conducting an experiment inside an elevator that can move in a vertical shaft. A load is hung vertically from the ceiling on a string, and is stationary with respect to you.
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If the pooled sample is positive then individually test each of the 500 samples in the pool. What is the probability that we obtain a positive test result for a randomly chosen pooled sample?
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Participant reactions to the confederate were recorded by a camera hidden in the ceiling. Is it likely that there will be a Hawthorne effect in this example?
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