From a fixed point on the ground, the distance to a certain tree is measured to be s = 55.2 ± 0.1 m and the angle from the point to the top of the tree is measured to be ? = 0.50 ± 0.02 radians. The height of the tree is given by h = s tan ?.

a. Estimate h, and find the uncertainty in the estimate.
b. Which would provide a greater reduction in the uncertainty in h: reducing the uncertainty in s to 0.05 m or reducing the uncertainty in ? to 0.01 radians


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Erosion protection may be required during which of the following steps of the construction process?

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management thought over the years?

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A map that shows water, relief, and culture is known as a:

a. Military map b. Topographic map c. Nautical map d. Cadastral map e. Engineering map

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To control the amount of metal buildup when performing flat fillet welds with GMAW, the welder should

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