Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337671729
Author: SERWAY
Publisher: Cengage
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Chapter 36, Problem 24P
To determine

The minimum amount of oil that was spilled.

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As a summer intern assigned to the Olympics Kayaking committee, you need to determine the speed of water flowing through a rapids section of the river in order to classify the rapids. For the purposes of your calculation, you assume the river has a rectangular cross section. You determine that for the region of interest, the river narrows from a width of 14 m to a width of 5.0 m and the depth of the river decreases from 2.0 m to 0.70 m. You also know that the speed of the river before the rapids is 1.7 m/s. Determine the speed of the river through the section of rapids.m/s
As a summer intern assigned to the Olympics Kayaking committee, you need to determine the speed of water flowing through a rapids section of the river in order to classify the rapids. For the purposes of your calculation, you assume the river has a rectangular cross section. You determine that for the region of interest, the river narrows from a width of 14 m to a width of 5.0 m and the depth of the river decreases from 2.0 m to 0.78 m. You also know that the speed of the river before the rapids is 2.3 m/s. Determine the speed of the river through the section of rapids. 16.5 m/s
Its wintertime and you are in need of portable electrical heater for your room and you are comparing two different products. The first heater has metal grills made of aluminum and has dimensions of 0.75 [m] x 0.05 [m] x 0.01 [m] while the second heater has metal grills made of iron and has dimensions of 1.00 [m] x 0.03 [m] x 0.01 [m]. You wish to heat your room from 10 degrees Celsius to a nice toasty 28 degrees Celsius and your wall outlet provides 120 [V]. A)What is the resistance of the aluminum and iron heater at 28 degrees Celsius? B)What is the current for the aluminum and iron heater operating at 28 degrees Celsius? C)If you wish to operate your heater for 4 hours and the cost of electricity is $0.12 per kilowatt-hour, which heater has cheaper operational costs?
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