In a Young's double-slit interference apparatus, by what factor is the distance between adjacent light and dark fringes changed when the wavelength of the source is doubled?
a. 1/2
c. 1
b. 1/4
d. 2
D
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Is often called the fully-implicit form of the one-dimensional transient conduction difference equation because all quantities in the equation, except for the temperatures in the energy storage term, are evaluated at the new time step, m + 1. In an alternate form called Crank-Nicholson, these quantities are evaluated at both time step m and m + 1 and then averaged. This averaging significantly improves the accuracy of the numerical solution relative to the fully-implicit form without increasing the complexity of the solution method. Derive the one-dimensional transient conduction difference equation in the Crank-Nicholson form.
GIVEN One-dimensional transient conduction difference equation in the implicit form FIND (a) The Crank-Nicholson form of the difference equation
Estimate how many textbooks of 1000 pages stacked on top of each other would make a stack of books 10 feet high.
A. 60 B. 50 C. 40 D. 30 E. 20
X-rays from the Sun's corona
A) are absorbed in Earth's troposphere. B) are absorbed in Earth's thermosphere. C) cause meteor showers. D) break apart ozone in the stratosphere. E) generally reach Earth's surface and fry us.
The Sun is a spherically shaped star that is
composed primarily of a)iron. b)hydrogen. c)water. d)helium.