In a single-slit diffraction experiment, the angular width of the central maximum is 0.16°. The width of the slit is then doubled as is the distance to the screen. What is the resulting angular width of the central maximum?
a. 0.64°
c. 0.32°
b. 0.080°
d. 0.16°
B
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A two-shell-eight-pass heat exchanger is used to recoup heat from coolant water in a manufacturing plant. The heat exchanger has a rated area of 15 m^2 with an overall heat transfer coefficient of 900 W/m^2?K. The device has been used and has a fouling factor of 0.0001 m2?K/W. The coolant water enters at 85ºC and leaves at 55ºC whereas the cooling water enters at 15ºC and leaves at 45ºC. Determine (a) the mass flow of the coolant water and (b) the heat exchanger effectiveness.
What will be an ideal response?
The axes on a Hertzsprung-Russell (H-R) diagram represent ________
A) mass and radius B) luminosity and surface temperature C) mass and luminosity D) luminosity and apparent brightness
Cygnus X-1 was discovered because it is a(n) ________ source in a(n) ________ system
Fill in the blank(s) with correct word
Intensity: A certain electromagnetic field traveling in vacuum has a maximum electric field of 1200 V/m. What is the maximum magnetic field of this wave? (c = 3.0 × 108 m/s)
A. 3.4 × 10-4 T B. 4.0 × 10-6 T C. 2.2 × 10-5 T D. 9.6 × 10-6 T E. 8.7 × 10-6 T