Determine the velocity of the center of mass of two balls
Two balls are approaching each other head-on. Their velocities are +9.86 and -11.9 m/s. Determine the velocity of the center of mass of the two balls if they have the same mass.
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A Psychologist has developed a new method designed to help people taking an exam. The method requires the person to come to the office of the Psychologist 5 times over a 5 week period and involves hypnosis and mental exercises.
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A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is 18. Compute the 95% confidence interval for the population mean (to 1 decimal).
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