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The components of an electronic system dissipating 180 W are located in a 1.4-m-long horizontal duct whose cross section is 20 cm = 20 cm. The components in the duct are cooled by forced air that enters the duct at 30°C and 1 atm at a rate of 0.6 m3/min and leaves at 40°C. Determine the rate of heat transfer from the outer surfaces of the duct to the ambient.
Problem: A sector with central angle θ is cut from a circle of radius R = 6 inches (see figure), and the edges of the sector are brought together to form a cone. Find the magnitude of θ such that the volume of the cone is a maximum.
Debate if "failing to reject the null" is the same as "accepting the null." Support your position with examples of acceptance or rejection of the null. Next, give your opinion on whether or not a failed t test "proves" the null hypothesis.
1a a company is manufacturing a product which requires at the final assembly stage three parts. these three parts can
Prove that the set of bijections from Z to Z with the operation composition of functions is a group. You may assume that composition of functions is associative - Write out the Cayley table for this group, with the headline and sideline.
You are a census officer in a newly democratic nation and you have been charged with using the census data from the table below to determine how 100 congressional seats should be divided among the 10 states of the union.
Calculate the upward force on the anchorage when the pipeline is flowing full. Calculate the upward force on the anchorage when the pipeline is empty. Assume density of steel is 7900kg/m3 and that of water is 1000kg/m3
Even though independent gasoline stations have been having a difficult time, Susan Solomon has been thinking about starting her own independent gas station. Susan's problem is to decide how large her station should be.
It conducts a telephone poll of 300 randomly selected households in the area and finds that 100 have dvd players. state the p-vaule of the test.
Neglecting atmospheric pressure, find the total force due to water pressure acting on a thin strip of the dam of height dy located at a depth y.
Define a linear map T from the vector space C to the vector space and matrix multiplication and with the identity matrix
This question is asking you to compare the likelihood of your getting 4 or more subscribers in a sample of 50 when the probability of a subscription has risen from 0.02 to 0.06.] Talk about the comparison of probabilities in your explanation.
2. Draw the complex spectrum (both magnitude and phase) for the following signals:
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