Light of wavelength 575 nm falls on a double-slit and the third order bright fringe is seen at an angle of 6.5°. What is the separation between the double slits?
A) 5.0 ?m
B) 10 ?m
C) 15 ?m
D) 20 ?m
E) 25 ?m
C
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A plane truss with span length L 5 4.5 m is constructed using cast iron pipes (E 5 170 GPa) with a cross-sectional area of 4500 mm2. The displacement of joint B cannot exceed 2.7 mm. The maximum value of loads P is approximately:
(A) 340 kN
(B) 460 kN
(C) 510 kN
(D) 600 kN
A solar heating system has a 25.0% conversion efficiency; the solar radiation incident on the panels is 800 W/m2 . What is the increase in temperature of 25.0 kg of water in a 1.00-h period by a 3.40-m2-area collector? (cw = 4 186 J/kg/°C)
a. 93.6°C b. 6.88°C c. 23.4°C d. 46.8°C e. 17.5°C
Two point charges of values +2.0 and +5.5 ?C, respectively, are separated by 0.50 m. What is the potential energy of this 2-charge system? (ke = 8.99 × 10^9 N?m2/C2)
a. +0.50 J b. ?0.20 J c. +0.20 J d. ?0.41 J e. +0.41 J
Define solubility. Give an example