Assume when using a meter stick measuring can be done so that the last significant figure is in the tenth of a millimeter digit. If you are measuring an object with length between 6 and 7 cm, how many significant figures will result if you only use the part of the meter stick between the 1-cm and 9-cm positions?
a. 2
b. 3
c. 4
d. 5
e. more than 5
b
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An industrial flywheel has a greater rotational inertia when most of its mass is
A) nearer the rim. B) nearer the axis. C) uniformly spread out as in a disk.
A set of data points is plotted in the graph at right. Which points should be used to find the slope of the line?
A. The blue circles. B. The red X’s. C. The green triangles.
Which of the following is true of life on Earth?
A) Life, in the form of multicellular organisms, has existed on Earth for only about 2 million years. B) Life has existed on Earth for at least 3.4 billion years. C) The Cambrian explosion marks the formation of the first unicellular organisms on Earth. D) Complex multicellular organisms were present on Earth 2.5 billion years ago.
What is necessary for convection to occur in a substance?
A) The substance must be subjected to a strong magnetic field. B) Dense material must be added to the substance. C) The substance is strongly shaken or disturbed by a strong wind. D) The substance is strongly cooled from underneath. E) The substance is strongly heated from underneath.