If the central maximum in a single slit diffraction pattern has intensity I0, the intensity of the secondary maximum that is nearest to it is closest to
A) I0. B) 2I0. C) I0/4. D) I0/2. E) 0.045I0.
E
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When two objects at different temperatures are placed in thermal contact, heat flows
A. only if both objects are at the same temperature B. from the higher temperature object to the lower temperature object C. from the lower temperature object to the higher temperature object
A coaxial cable has an inner cylindrical conductor surrounded by cylindrical insulation and an outer cylindrical conducting shell. The outer shell carries the same current but in the opposite direction from that in the inner conductor as shown. If the coaxial cable sits in a uniform magnetic field directed upwards with respect to the cable, the effect of the field on the cable is
A. a net force to the left. B. a net force to the right. C. a net force upwards. D. no net force but a slight shift of the inner conductor to the left and the outer conductor to the right. E. no net force but a slight shift of the inner conductor to the right and the outer conductor to the left.
The type of radiation affected by greenhouse gasses is
a. UV radiation. b. IR radiation. c. visible radiation. d. gamma radiation.
The volume of a gas changes from 0.750 m3 to 0.320 m3 at a constant pressure of 1.5 × 10^5 Pa. How much work is done by the gas on its environment?
a. 4.8E+4 J b. –6.5E+4 J c. –4.8E+4 J d. 6.5E+4 J