If iron with 4.3 wt. % carbon is heated to 850°C for an extended period of time, what is the resulting form of cast iron?
(a) White
(b) Malleable
(c) Gray
(d) Nodular
(b) Malleable
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Answer the following statement(s) true (T) or false (F)
1. A current-carrying circular loop and a current-carrying straight wire create very different magnetic fields in the empty space that surrounds them. Even so, the curl of at a distance r from the center of the loop along its axis and the magnitude of the curl the same distance r from the wire’s center have the same numerical value.
Solar power is commonly used to produce
A) heat. B) electricity. C) both of these
Frictional forces between a probe and a sample are measured with a variant of which microscope?
(a) An optical microscope (b) A SEM (c) A STM (d) An AFM
Two resistors of values 7.0 and 15.0 ? are connected in parallel. This combination in turn is hooked in series with a 3.8-? resistor and a 22.3-V battery. What is the current in the 3.8-? resistor?
a. 21 A b. 2.6 A c. 0.86 A d. 5.9 A e. 190 A