An object is placed 10 cm in front of a mirror, and an image is formed that has a magnification of 2.5 . Which of the following statements is true?
a. This is the only true statement.
b. The focal length of the mirror is 30 cm.
c. The image is real.
d. The image is inverted.
A
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Exclusion Principle: How many 3d electron states can an atom have?
A. 0 B. 4 C. 6 D. 8 E. 10
What happens during a penumbral lunar eclipse? a. Earth only partially enters the penumbra. b. Earth enters the entire penumbra
c. The Moon partially enters the penumbra. d. The Moon only partially enters the umbra. e. Earth only partially enters the penumbra.
Ten coulombs of charge start from the negative terminal of a battery, flow through the battery and then leave the positive terminal through a wire, flow through a resistor, and then return to the starting point on this closed circuit. In this complete process, the ten coulombs:
a. receive heat energy from the resistor. b. do positive work on the battery. c. have a net loss of potential energy. d. have no net change in potential energy.
A long cylindrical shell (radius = 2.0 cm) has a charge uniformly distributed on its surface. If the magnitude of the electric field at a point 8.0 cm radially outward from the axis of the shell is 85 N/C, how much charge is distributed on a 2.0-m length of the charged cylindrical surface?
a. 0.38 nC b. 0.76 nC c. 0.19 nC d. 0.57 nC e. 0.98 nC