Consider the steel and concrete boundary shown in the figure and write the node equation for node n. Identify the maximum time step allowed for the explicit method of solving for temperatures.
What will be an ideal response?
Referring to the figure, ?x = ?y = 0.1 m and for the nth node shown
For the explicit method, making substitutions and solving for the new node temperature,
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Which of the following features of a telescope determines its light gathering power?
a. The focal length of the objective b. The focal length of the eyepiece c. The diameter of the objective d. Length of the telescope tube e. None of the above.
A positive ion has a deficiency of
A) electrons. B) neutrons. C) negative ions.
A certain speed boat weighs 4,900 N. It can accelerate from 0 to 20 m/s in 5 seconds. (a) What is the mass of the boat? (b) What is the acceleration? (c) How large is the net force acting on the boat?
The light from Polaris is 24.2 times less intense than the light received from Sirius. Which star is the truly brighter star, that is, emitting more visual light at its surface?
a. Polaris b. Sirius c. Neither, they emit the same amount at their surfaces. d. This cannot be determined based upon the information given.