Bragg reflection results in a first-order maximum at 12.2°. In this case, at what angle would the second-order maximum occur?
a. 24.4°
b. 12.2°
c. 7.79°
d. 25.0°
e. 78.5°
d
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The Earth's layer with plastic-like behavior is the
A) mantle. B) crust. C) inner core. D) outer core.
For a cube-shaped room, 10 ft on a side, what will be the rate of heat loss if the R-value is 4 ft2-°F hr/Btu for each side and the ?T is 50 F?
a. 800 b. 1200 c. 5000 d. 7500 e. 12,000 Btu/hr
A solid non-conducting sphere of radius R carries a uniform charge density. At a radial distance r1 = R/4 the electric field has a magnitude E0. What is the magnitude of the electric field at a radial distance r2 = 2R?
A) E0/4 B) 0 C) E0/2 D) E0 E) 2E0
A 1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. What is the magnitude of the friction force required to keep the car from sliding?
A) 9000 N B) 9800 N C) 300 N D) 900 N E) 3000 N