The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.

a. 15 mph
b. 5 mph
c. 10 mph


b. 5 mph

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How is a wafer first formed?

What will be an ideal response?

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A floor plan is a(n) ____ view taken at a height that shows the placement of walls, windows, doors, cabinets, and other important features.

A. front B. foundation C. section D. elevation

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The flow rate of water through a cylindrical pipe is given by Q=?r2v , where r is the radius of the pipe and v is the flow velocity.

a. Assume that r=3.00 ± 0.03 m and v=4.0 ± 0.2 m/s. Estimate Q, and find the uncertainty in the estimate. b. Assume that r=4.00 ± 0.04 m and v=2.0 ± 0.1 m/s. Estimate Q, and find the uncertainty in the estimate. c. If r and v have not been measured, but it is known that the relative uncertainty in r is 1% and that the relative uncertainty in v is 5%, is it possible to compute the relative uncertainty in Q? If so, compute the relative uncertainty. If not, explain what additional information is needed.

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By the 1870s, many Europeans were increasingly choosing marriage partners on what basis?

a. love b. wealth c. social status d. religious affiliation

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