A circular steel rod 0.005 m in radius and 4.000 m long is subject to an axial force of 0.250 × 105 newtons. We observe that the rod elongates 0.616 × 10-2 m. Calculate the tensile stress and the axial strain in the rod.
What will be an ideal response?
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Life emerged from the oceans about _________ billion years ago
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Three resistors connected in series each carry currents labeled I1, I2 and I3 . Which of the following expresses the value of the total current IT in the system made up of the three resistors in series?
a. IT = I1 + I2 + I3 b. IT = (1/I1 + 1/I2 + 1/I3) c. IT = I1 = I2 = I3 d. IT = (1/I1 + 1/I2 + 1/I3)?1
A 0.14-km wide river flows with a uniform speed of 4.0 m/s toward the east. It takes 20 s for a boat to cross the river to a point directly north of its departure point on the south bank. What is the speed of the boat relative to the water?
a. 5.7 m/s b. 8.5 m/s c. 8.1 m/s d. 7.0 m/s e. 6.4 m/s
If the outside air pressure decreases, the reading on a tire gauge connected to a tire __________
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