Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32° from the centerline, what is the distance between the slits of the grating?
A) 0.93 ?m
B) 1.4 ?m
C) 2.8 ?m
D) 8.5 ?m
C
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A composite beam is made up of a 200 mm 3 300 mm core (Ec 5 14 GPa) and an exterior cover sheet (300 mm 3 12 mm, Ee 5 100 GPa) on each side. Allowable stresses in core and exterior sheets are 9.5 MPa and 140 MPa, respectively. The ratio of the maximum permissible bending moment about the z axis to that about the y axis is most nearly:
(A) 0.5
(B) 0.7
(C) 1.2
(D) 1.5
The horizontal surface on which the objects slide is frictionless. If M = 1.0 kg and the magnitude of the force of the small block on the large block is 5.2 N, determine F.
A. 6.0 N B. 9.0 N C. 7.8 N D. 4.8 N E. 4.1 N
At what frequency will a 20.0-mH inductor have an inductive reactance of 100 ??
A) 225 Hz B) 655 Hz C) 796 Hz D) 457 Hz E) None of the other answers is correct.
At the surface of Saturn's atmosphere the strength of the magnetic field is:
A) about the same as Mercury's magnetic field at its surface. B) about the same as Venus' magnetic field at its surface. C) about the same as Earth's magnetic field at its surface. D) about the same as Mars' magnetic field at its surface. E) about the same as Jupiter's magnetic field at its atmospheric surface.