Which one of the following properties of light is evidence of the wave nature of light?
A) Reflection of light
B) Refraction of light
C) Emission of light
D) Dispersion of light
E) Interference of light
E
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A thin-walled spherical tank has a diameter of 0.75 m and an internal pressure of 20 MPa. The yield stress in tension is 920 MPa, the yield stress in shear is 475 MPa, and the factor of safety is 2.5. The modulus of elasticity is 210 GPa, Poisson’s ratio is 0.28, and maximum normal strain is 1220 3 1026. The minimum permissible thickness of the tank is approximately:
(A) 8.6 mm
(B) 9.9 mm
(C) 10.5 mm
(D) 11.1 mm
A car traveling at a velocity v can stop in a minimum distance d. What would be the car's minimum stopping distance if it were traveling at a velocity of 2v?
(a) d. (b) square root of 2d (c) 2d. (d) 4d. (e) 8d.
As the radius of the orbit of an artificial satellite increases, its orbital period __________
Fill in the blank(s) with correct word
A stonecutter's chisel has an edge area of 0.7 cm2 . If the chisel is struck with a force of 42 N, what is the pressure exerted on the stone?
a. 600 N/m2 b. 30,000 N/m2 c. 300,000 N/m2 d. 600,000 N/m2 e. 6000 N/m2