A radio wave signal, which transmits at a frequency of 5.64 MHz, has what wavelength? (c = 3.00 × 10^8 m/s)
a. 532 m
b. 106 m
c. 53.2 m
d. 167 m
e. 28.3 m
c
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An aluminum bar (E 5 72 GPa, ? 5 0.33) of diameter 50 mm cannot exceed a diameter of 50.1 mm when compressed by axial force P. The maximum acceptable compressive load P is approximately:
(A) 190 kN (B) 200 kN (C) 470 kN (D) 860 kN
________ optics greatly reduces the effect of atmospheric turbulence by deforming the shape of the mirror by computer control
Fill in the blank(s) with correct word
A 10-kg rock and 20-kg rock are dropped from the same height and there is no air. If it takes the 20-kg rock a time T to reach the ground, what time will it take the 10-kg rock to reach the ground?
A) 4T B) 2T C) T D) T/2 E) T/4
Light strikes a diamond (n = 2.42) immersed in glycerin (n = 1.473) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
a. 20° b. 60° c. 32° d. 64° e. 15°