A simply supported laminated beam of length L 5 0.5 m and square cross section weighs 4.8 N. Three strips are glued together to form the beam, with the allowable shear stress in the glued joint equal to 0.3 MPa. Considering also the weight of the beam, the maximum load P that can be applied at L/3 from the left support is approximately:
(A) 240 N
(B) 360 N
(C) 434 N
(D) 510 N
(C) 434 N
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White light is spread out into spectral hues by a diffraction grating. If the grating has 1000 lines per cm, at what angle will red light (? = 640 nm) appear in first order?
A. 14.7° B. 7.35° C. 17.7° D. 3.67° E. 1.84°
A 4-?F capacitor has a potential drop of 20 V between its plates. The electric potential energy stored in this capacitor is:
A) 0.8 ?J B) 8 ?J C) 80 ?J D) 800 ?J E) 8000 ?J
Two identical concentric loops are arranged as shown in the diagram below. Loop 1 initially carries a steady current driven by the power supply shown. 
Suppose that when we turn off the power supply, it takes a small but finite time for the current to decay to zero in loop 1. In what direction does the current induced in loop 2 flow during this time interval?
A. Clockwise. B. Counterclockwise. C. No current flows in loop 2. D. One needs more information to answer.
Venus' surface temperature is fairly uniform, hot on both day and night sides
Indicate whether the statement is true or false