Physics, 15.04.2020 16:08, tynitenaire
A rock is thrown upward from a bridge into a river below. The function f(t)=−16t2+44t+88 determines the height of the rock above the surface of the water (in feet) in terms of the number of seconds t since the rock was thrown.
What is the bridge's height above the water?
feet
How many seconds after being thrown does the rock hit the water?
seconds
How many seconds after being thrown does the rock reach its maximum height above the water?
seconds
What is the rock's maximum height above the water?
Answers: 2
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Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?
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A rock is thrown upward from a bridge into a river below. The function f(t)=−16t2+44t+88 determines...
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