When iron is galvanized, it is coated with _________.
Fill in the blank(s) with the appropriate word(s).
zinc
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The expansion of the universe seems to be accelerating. The evidence for this is based on observations of
A) the manner in which the stars are distributed in our own galaxy. B) the cosmic background radiation. C) the slowing down in the pulsation rate of distant neutron stars. D) gas clouds orbiting the centers of galaxies. E) the redshift in the light from the explosions of distant supernovas.
If one metal has double the number of conduction electrons per unit volume of a second metal, then its Fermi level is how many times that of the second metal?
A) 1.41 B) 2.83 C) 2.00 D) 3.22 E) 1.59
An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object?
A. 35 m/s B. 25 m/s C. 30 m/s D. 21 m/s E. 17 m/s
How much does it cost a household to run its coffee machine if it is used two hours per day and draws 1500 W? Assume the cost of electricity is $0.08/kWh
What will be an ideal response?