sibuzwaW
2021-05-09
The most common form of drag experienced by vehicles (bikes, cars, planes, etc.) at operating speeds is called form drag. Itincreases quadratically with velocity (essentially because theamount of air you run into increase with v and so does the amount of force you must exert on each small volume of air). Thus
where A is the cross-sectional area of the vehicle and is called the coefficient of drag.
Part A:
Think about a car moving at a constant speed. . Find the power dissipated by form drag.
Express your answer in terms of and speed v.
Part B:
A certain car has an engine that provides a maximum power . Suppose that the maximum speed of thee car, , is limited by a drag force proportional to the square of the speed (as in the previous part). The car engine is now modified, so that the new power is 10 percent greater than the original power ().
Assume the following:
The top speed is limited by air drag.
The magnitude of the force of air drag at these speeds is proportional to the square of the speed.
By what percentage, , is the top speed of the car increased?
Express the percent increase in top speed numerically to two significant figures.
Roosevelt Houghton
Skilled2021-05-11Added 106 answers
see my explanation
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Write an exponential function showing relationship between y and t.
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t e^-4t sin3t
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Pets Plus and Pet Planet are having a sale on the same aquarium. At Pets Plus the aquarium is on sale for 30% off the original price and at Pet Planet it is discounted by 25%.
Store | Original Price of Aquarium ($) |
Pets Plus | 118 |
Pet Planet | 110 |
If the sales tax rate is 8%, which store has the lower sale price?
, 1 of 1.Select ChoicePets PlusPet Planet has the lower sale price.
Part B
Fill in the blank question.
How much will you save by buying the aquarium at the store with the lower sale price? Round to the nearest cent.
$
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