A stress of 210 MPa is applied to a low-carbon steel with an elastic modulus of 211 GPa. After the stress is applied and then removed, we note that the permanent strain at 0 stress is 0.1. What was the total strain when the stress was equal to 210 MPa?
What will be an ideal response?
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A car is moving in the positive direction along a straight highway and accelerates at a constant rate while going from point A to point B. If the acceleration is positive, increasing the speed of the car, when does the position where the average speed equals the instantaneous speed occur during the time interval from A to B? Assume the time interval is T
a. T/2 from the start of the interval c. after T/2 from the start of the interval b. before T/2 from the start of the interval d. It depends on the speed at the start of the time interval.
Shear Modulus: The base of a metal block, which is fixed in place, measures 90 cm by 90 cm, and the height of the block is 60 cm. A force, applied to the upper face and parallel to it, produces a shear strain of 0.0060. The shear modulus of this metal is 3.0 × 1010 Pa. The displacement of the upper face, in the direction of the applied force is closest to
A. 3.0 mm. B. 3.6 mm. C. 4.2 mm. D. 4.8 mm. E. 5.4 mm.
Which color of light has the lowest energy photons?
A) red B) yellow C) green D) blue E) orange
What can contribute to a planet losing its atmosphere?
A) thermal escape B) large impacts C) solar wind stripping D) all of these