How many ng of the element were originally present
At the end of an experiment with a radioactive element, 1.90 ng of the element remained. If 3 half lives passed, how many ng of the element were originally present?
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A certain car traveling 32.0 mph skids to a stop in 35 meters from the point where the brakes were applied. In approximately what distance would the car stop had it been going 89.6 mph?
A customer enter a bank and finds that all three tellers are occupied and he is the next in line. Suppose the mean transaction time are 5 minutes and are independent exponential random variables. What is the expected amount of time that he has to
Assume the distribution of the length of the cuts follows the normal distribution with a population standard deviation of 10 seconds. Suppose we select a sample of 25 cuts from various CDs sold by CRA CDs Inc. What percent of the sample means will
Three resistors with values 1.0 , 2.1 , and 4.2 are connected in parallel in a circuit with a 7.2 battery. What is the total equivalent resistance?
Find the marginal densities for both X and Y. What type of random variable is Y? Intuitively speaking, are X and Y independent? Jusify your answer mathematically.
A 1500 kg space ship is at a height of 4.30 x 10^7 m above the surface of the Earth traveling at 3600 m/s. a.) Could this space ship be in a circular orbit? Explain.
When another 1.00g sample of ascorbic acid is diddolved in 10.0g of water the freezing point of the solution is -1.06C. At this temperature the dissociation of ascorbiacid is negligible.
A passenger in an automobile observes that raindrops make an angle of 30 degrees with the horizontal as the auto travels forward with a speed of 60 km/h.
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