A Young's double-slit apparatus is set up. The source wavelength is 430 nm, and the double-slit spacing is 0.040 mm. At what distance from the double slits should the screen be placed if the spacing between alternating bright fringes is to be 2.6 cm? (1 nm = 10-9 m)
a. 2.9 m
c. 2.2 m
b. 2.4 m
d. 1.6 m
B
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Write the governing equation and the necessary boundary conditions for the problem of a heat exchanger tube as shown in Figure 2-54.
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A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg ? m2. If the arms are pulled in so the moment of inertia decreases to 1.80 kg ? m2, what is the final angular speed?
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