Expected number of flips
A fair coin is flipped until heads or tails have occurred twice in a row. Find the expected number of flips. Show all work.
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If we want to propel a portion of the rocket to infinity (in the direction tangential to the circular orbit), what's the escape speed from there?
There is friction as the pulley turns. The block starts from rest, and its speed after it has traveled downwards a distance of D= 0.65 m, is 1.388 m/s. Calculate the amount of energy dissipated up to that point.
Assume that I have a variable with a sample mean = 10, and sample n = 50. And let's say that the population standard deviation for the variable = 3. How would I create a 95% confidence interval around the sample mean based on this information?
A 5.00-kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 3.20 mm deep, what is the average force exerted by the plate on the ball during the impact?
Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 275 mL of coffee from 25.0 celsius to 62.0 Celsius?
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How would I go about creating the following frequency distributions for the scores? Ungrouped, relative, cumulative, and cumulative relative frequency distributions. I want to include exact limits in the distribution. (This uses the continuous dat
A potential difference of 120 V produces a current of 8.0 A in the heating element of a toaster. What is the resistance of this heating element while the toaster is carrying this current?
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Which of the following best describes the rationale of those public officials who are promoting the policy referenced in the title of the Texas Tribune article?
Problem: Political messaging and how a policy is framed to one's supporters and to the general public are important.
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Question: Which of the following statements illustrates the impact of the reform era (1900-1920) on US political parties?