The thermal coefficient of linear expansion of Copper is 1.7 × 10-5 C°-1. What is the thermal volume expansion coefficient?
What will be an ideal response?
5.1 × 10-5 C°-1
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Even if societies on stars in distant galaxies survive at a technological level for only 10 years, that is long enough to establish two-way communication with them
Indicate whether the statement is true or false
To make a profit a buyer purchases metal by weight at one altitude and sells it at the same price per pound at another altitude. The supplier should
A) buy at a high altitude and sell at a low altitude. B) buy at a low altitude and sell at a high altitude. C) it makes no difference.
Which of the following phenomena are not thought to be results of collisions or other interactions between galaxies?
A) the fact that spiral galaxies have both disk and halo components B) the fact that elliptical galaxies are more common in clusters of galaxies than outside clusters C) starbursts D) the presence of very large, central dominant galaxies in clusters of galaxies
A thin-walled cylindrical tank, under internal pressure p, is compressed by a force F 5 75 kN. Cylinder diameter is d 5 90 and wall thickness t 5 5.5 mm. Allowable normal stress is 110 MPa and allowable shear stress is 60 MPa. The maximum allowable internal pressure pmax is approximately:
(A) 5 MPa
(B) 10 MPa
(C) 13 MPa
(D) 17 MPa
