In order for you to get out of bed with the least amount of work, would it be better for your bed to be on the floor or a meter high?
A) It makes no difference, because you must change your position from lying down to standing up in either case.
B) It makes no difference, because the total amount of physical work done in either case is zero.
C) Both of the above.
D) It would be better for the bed to be on the floor, because then you would not need to do as much work to get your feet down onto the floor.
E) It would be better for the bed to be a meter high, because then you would not need to do as much work in lifting yourself to your feet.
E
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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.
Microfossils found in northwestern Australia in 2011 appears to have used compounds based on which element for metabolism?
A) sulfur B) oxygen C) nitrogen D) carbon
James Hutton studied rock formations in his native Scotland to determine that the Earth is much __________ than previously believed, and that catastrophes _________ shaped the landscape.
Fill in the blank(s) with the appropriate word(s).
If you swing a bucket of water fast enough in a vertical circle, at the highest point the water does not spill out. This happens because an outward force balances the pull of Earth on the water
A) True B) False