Question regarding the population mean
How large a sample should be taken if the population mean is to be estimated with 90% confidence to within $79? The population has a standard deviation of $908.
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A flat surface with area 2.2 m2 is in a uniform electric field of 910 N/C. What is the electric flux through the surface when it is at right angles to the field, 45 degrees to the field and parallel to the field?
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Determine (a) the velocity of air through the fan (m/s), (b) the force required to hold the fan in place and (b) the minimum power (hp) input required for the fan.
An electron is released from rest at a distance of 0.500m from a large insulating sheet of charge that has uniform surface charge density 3.70×10-12C/m2 .
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