One ampere × one second is a unit of
a. power.
b. current.
c. voltage.
d. electric charge.
e. resistance.
d
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At a pressure of 1 atmosphere a column of mercury in a barometer is supported to the height h = 0.76 m. The density of mercury is 13.6 × 10^3 kg/m3 . A barometer of similar design filled with water would support a column of water how high at a pressure of 1 atmosphere?
a. more than ten times h c. less than one tenth h b. about 1.36h d. the same height h
Water flowing in a pipe is similar to electric current flowing in a circuit. Which concept in the water flow system is analogous to the charge in an electric circuit?
a) Pump
b) water
c) valve
d) pressure
Life forms in the Precambrian included
A) trilobites. B) brachiopods. C) coelacanths. D) cyanobacteria.
Magnetic fields are created by moving charged particles.
Answer the following statement true (T) or false (F)