In the two-slit experiment, the distance between the slits and the screen is 1.1 m and the distance between the slits is 0.040 mm
If the first-order bright fringe is measured to be 3.4 cm from the centerline, what is the distance between the adjacent bright fringes?
A) 1.7 cm
B) 5.1 cm
C) 7.0 cm
D) 6.8 cm
E) 3.4 cm
E
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What is the sign of these fields’ divergence at point P on each diagram? (Hint: Draw a cross-sectional view of a small div-meter centered on the point in question, and sketch the electric field vectors at the midpoint of each of the div-meter’s four sides in the drawing’s plane. Don’t worry about how we might create such a field. 
A. The divergence is positive. B. The divergence is negative. C. The divergence is zero.
When an ideal gas undergoes a slow isothermal expansion:
A. the work done by the gas is the same as the energy absorbed as heat B. the work done by the environment is the same as the energy absorbed as heat C. the increase in internal energy is the same as the energy absorbed as heat D. the increase in internal energy is the same as the work done by the gas E. the increase in internal energy is the same as the work done by the environment
The kinetic energy of a pendulum is least
a. when its potential energy is least. b. at the top of its swing. c. at the bottom of its swing. d. when its total energy is greatest.
If the average lifetime of a proton was 1033 years, about how many protons would you have to assemble together and observe simultaneously in order to witness a total of 100 proton decays in one year?