How many pump stations needed for a pipeline
A 200mm DN pipeline has to deliver 80m³/h of water at a discharge pressure of 5,550kPa. Approximately how many pump stations would be needed for a pipeline 300km long?
Expected delivery within 24 Hours
Taking samples of size n = 2, find the mean of the sample means and the standard deviation of the sample means. Explain the relationships between the different means and the different standard deviations.
Two point charges are seperated by a distance R and they repel each other with a force F. If their seperation is reduced to 0.25 times the original value, what is the magnitude of the force of replusion between them?
Measurements of the diameter of a random sample of 100 ball bearings made by a certain machine during one week showed a mean of 0.944 inch and a standard deviation of 0.052 inch. Find a 90% Confidence interval for the mean diameter of all the ball
In measuring reaction time, a human factors engineer estimates that the standard deviation is 0.20 second. How large a sample of measurements must be taken in order to be 95% confidence that the error in her estimate of the mean reaction time will
The bulk modulus for bone is about 1.5*10^10Pa. If a diver-in-training is put into a pressurized suit, by how much would the pressure have to be raised (in atmospheres) above atmospheric pressure to compress her bones by 0.120% of their original v
A sample of 15 measurements of the diameter of a shaft gave a mean Xbar=4.38 inches and a standard deviation s=0.06 inch. Find a 95% confidence interval for the population mean of the shafts
A 4 kW motor is driving an oil pump with an efficiency of 95% down a 10 mm diameter pipe. If the velocities of the fluid down the pipe is 1.8 m/s. What is the flow rate that the pump delivers?
A truck driver used sand to soak up a 1 g spill of lindane(C6H6Cl6). He placed the contaminate soil in an open drum which then filled up with 150 L ofrain water during a rainstorm. You test the water to find a concentration of 17 M/L.
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