An 800-N man stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is
A) 200 N.
B) 400 N.
C) 800 N.
D) 1600 N.
E) none of the above
Answer: B
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A wing of a particular airplane is 10 m wide. During flight conditions air at 80 kPa and - 10ºC passes around the wing at 400 m/s. If the wing surface temperature is 80ºC determine: a) how much of the boundary layer is turbulent if the critical Reynolds number is taken as 5 x 10^5, b) the average convective heat transfer coefficient, and c) the heat transfer per unit area.
You are analyzing driveway lengths within your neighborhood and surrounding neighborhoods, and your data is to be presented to the city council. Which would be the most appropriate unit of measurement?
a. miles b. kilometers c. meters d. inches e. feet millimeters
What is the most accurate way to determine the distance to a relatively nearby star (within the Milky Way)?
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Why isn't there a planet where the asteroid belt is located?
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