Three wires are made of copper having circular cross sections. Wire 1 has a length L and radius r. Wire 2 has a length L and radius 2r. Wire 3 has a length 2L and radius 3r. Which wire has the smallest resistance?
1.wire 1
2.wire 2
3.wire 3
4.All have the same resistance.
5.Not enough information is given to answer the question.
3
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Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration must be correct?
A) Its acceleration is decreasing in magnitude as the car slows down. B) Its acceleration is positive. C) Its acceleration is negative. D) Its acceleration is zero.
The tensile strength for a certain steel wire is 3000 MN/m2. What is the maximum load that can be applied to a wire with a diameter of 3.0 mm made of this kind of steel?
A) 64 kN B) 9.0 kN C) 42 kN D) 85 kN E) 21 kN
What scientist discovered more elements than any other person?
a. Lavoisier b. Boyle c. Berzelius d. Davy
Many facilities that burn wood and hog waste (residues) are currently operating in the United States
What will be an ideal response?