The metric prefix that means one-hundredth (1/100) is
a. kilo-.
b. centi-.
c. mega-.
d. milli-.
[Ques. 2] The meter is presently defined as
a. one ten-millionth of the diameter of Earth.
b. the wavelength of a line in the spectrum of krypton-86.
c. the length of a platinum-iridium bar.
d. the distance light travels in a vacuum in a very short time.
[Ques. 3] The meter was defined originally as
a. one ten-millionth of the diameter of Earth.
b. one ten-millionth of the distance from the equator to the North Pole.
c. the wavelength of a line in the spectrum of krypton-86.
d. the length of a platinum-iridium bar.
[Ques. 4] In what year did the United States officially adopt the metric system?
a. 1893
b. 1995
c. 2011
d. 1776
e. none of these
[Ques. 5] The current definition of a kilogram is the mass of a platinum-iridium cylinder kept in
a. the United States.
b. France.
c. England.
d. Japan.
[Ques. 6] The standard unit of time, the second, is now defined with reference to
a. the Earth's revolution period.
b. the mean solar day.
c. the cesium-133 atom.
d. the Earth's rotation period.
[Ques. 7] The standard unit of length, the meter, is now defined with reference to
a. a meridian on the Earth.
b. the French meter.
c. the speed of light.
d. a platinum-iridium bar.
e. a member of the royal family.
[Ques. 8] The standard unit of distance in the mks system is the
a. centimeter
b. inch
c. kilometer
d. meter
e. second
[Ques. 9] The standard unit of time in the mks system is the
a. meter
b. kilogram
c. second
d. minute
e. microsecond
[Ques. 10] The standard unit of mass in the mks system is the
a. meter
b. kilogram
c. pound
d. second
e. gram
Quick Reply
