The charge flowing through a light bulb attached to a 12.0-V battery in 11.0 s is 30.0 C. What is the total energy delivered to the filament during this process?
a. 12.0 J
b. 360 J
c. 3 960 J
d. 132 J
e. 690 J
b
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Determine the largest permissible time step for a one-dimensional transient conduction problem to be solved by an explicit method if the node spacing is 1 mm and the material is (a) carbon steel 1C, and (b) window glass. Explain the difference in the two results.
GIVEN One-dimensional transient conduction in a 1-mm-thickness of carbon steel and window glass FIND (a) Largest permissible time step for each material
A galaxy has a recession velocity of 10,000 km/sec. If the Hubble constant is 65 km/sec. per megaparsec, roughly how far away is the galaxy?
A. 25 megaparsecs B. 10 megaparsecs C. 130 megaparsecs D. 60 megaparsecs
The electric field at the surface of a positively charged conductor has a direction characterized by which of the following?
a. tangent to the surface b. perpendicular inward toward the charge c. at a 45° angle to the surface d. perpendicular outward and away from the charge
In the Hertzprung—Russell diagram most stars are found
A) on the main sequence B) in the red giant region C) in the white dwarf region D) in the supergiant region