Appliances in the USA are designed to work on 110-120 V, whereas appliances in Europe operate on 220-240 V. What would happen if you tried to use a European electric shaver in this country?
A) It would probably work as well as it does in Europe, since it is the power rating, not the voltage rating, that matters.
B) It would probably work as well as it does in Europe, since it is the current rating, not the voltage rating, that matters.
C) It would barely work (or maybe not work at all), since the voltage here is too low to push enough current through the device.
D) It would probably overheat and burn up before very long.
E) This question cannot be answered without knowing the frequency used in Europe and in the USA, since this is the parameter that matters most in any electrical device that operates on alternating current.
C
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In FCC metals at low temperatures, screw dislocations can circumvent obstacles by _________.
Fill in the blank(s) with the appropriate word(s).
Olbers's paradox is an apparently simple question, but its resolution suggests that the universe is finite in age. What is the question?
A) Why is the sky dark at night? B) What would it be like to ride on a beam of light? C) How many stars are in the universe? D) Can we measure the position and momentum of an electron at the same time?
The blueness of the sky results from ______________
Fill in the blank(s) with correct word
A force on an object is given by F(x) = ( -4.00 N/m)x + ( 2.00 N/m3)x3. What is the change in potential energy in moving from x = 1.00 m to x = 2.00 m?
A) 10.0 J B) -1.50 J C) -10.0 J D) +1.50 J E) 12.0 J