Water is falling on a surface, wetting a circular area that is expanding at a rate of 6mm^2/s. How fast is the radius of the wet
ted area expanding when the radius is 109nm. (Round your answer to four decimal places.)
1 answer:
Answer:
0.0622ns
Step-by-step explanation:
Rate, R = 6mm²/s or 6 X 10∧-8m²/s
Radius, r = 109 X 10∧-9m
Area of circular object = πr² = 22/7 X (109 X 10∧-9)²= 3.734 X 10∧-14m²
Speed = 3.734 X 10∧-14m²/(6 X 10∧-8)m²/s = 0.0622ns
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