The constellation shaped like a big square (the "great square of . . . "), which can be used to help locate the March equinox in the sky, is
A) Cassiopeia.
B) Pegasus.
C) Canis Major.
D) Taurus.
E) Andromeda.
B) Pegasus.
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A spherical ball of lead (density 11.3 g/cm3 ) is placed in a tub of mercury (density 13.6 g/cm3). Which answer best describes the result?
A) The lead ball will float with about 83% of its volume above the surface of the mercury. B) The lead ball will float with its top exactly even with the surface of the mercury. C) The lead ball will float with about 17% of its volume above the surface of the mercury. D) The lead will sink to the bottom of the mercury. E) none of the above
What will you see with the following type of optic: Concave mirror
A. Image is smaller |
B. Image is the same |
C. Image is larger |
Charge in an Electric Field: If a point charge of -30 µC experiences an electrostatic upward force of 27 mN at a certain location in the laboratory, what are the magnitude and direction of the electric field at that location?
Fill in the blank(s) with the appropriate word(s).
If the voltage across a resistor is tripled, the current will
a. remain the same. b. be cut to one-third. c. be cut by one-third. d. be tripled. e. be multiplied by nine.