When electric current is flowing in a metal, the electrons are moving
A) at nearly the speed of light.
B) at the speed of light.
C) at the speed of sound in the metal.
D) at the speed of sound in air.
E) at none of the above speeds.
E
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When a carboxylic acid reacts with an amine, the products are water and a(n)
a. aldehyde. b. ester. c. amide. d. salt. e. ketone.
Neon signs require about 12,000 volts to operate. If the circuit uses a 120-volt power source, the ratio of primary to secondary turns on the transformer should be
A) 1 primary to 100 secondary. B) 100 primary to 1 secondary. C) neither of these
Which kind of robotic space mission enables us to study a planet for an extended period of time?
A) lander/probe B) sample return C) flyby D) orbiter
A copper alloy wire of length 2.0 m, cross sectional area 7.1 × 10^-6 m2, and Young's modulus 11 × 10^10 N/m2, has a 200-kg load hung on it. What is its increase in length? (g = 9.8 m/s2)
a. 0.50 mm c. 2.5 mm b. 1.0 mm d. 5.0 mm