Determine vegas diameter and effective temperature
The star Vega has a measured angular diameter of 3.24 mas (milliarcseconds) and a flux of 2.84 x 10-8 W/m2. Its distance is 8.1 pc. What are Vega's diameter and effective temperature?
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Air at 15 °C and atmospheric pressure is forced over the outside of the tube at a velocity of 15 m/s in a direction normal to the axis of the tube. What is the heat loss per length of tube in W/m?
What is the void fraction if the cubes are replaced with cylinders that have a diameter 0.02 m and a height 0.02 m, all other parameters remaining the same?
Steam at 40?C condenses on the outside of a 5-m-long, 3-cm-diameter thin horizontal copper tube by cooling water that enters the tube at 25?C at an average velocity of 2 m/s and leaves at 35?C. Determine the rate of condensation of steam.
47%of Americans when surveyed by a Gallup poll felt that having a gun in the home made them safer than having no gun. The margin of error reported was 3%. Construct an interval estimate
Assuming the car accelerates from 0 to 59 mph at a constant rate and that it can continue to accelerate at this rate without redlining, find how far the car travels and how long it takes to reach its maximum speed.
A square duct, 30 cm x 30 cm, is maintained at a constant temperature of 30 °C. Calculate the heat gained by the duct in W/m.
The mean number of sales per month for those who participated in the new program is 29. Compute the effect size of the new sales program.
There are no significant changes in kinetic or potential energy. Determine the net work of the cycle, in kJ, and the heat transfer for process 2-3, in kJ. Is this a power cycle or a refrigeration cycle? Explain.
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