If you stand closer to a concave mirror than a distance of one focal length, the image you see is
a. real and inverted.
b. real and upright.
c. virtual and inverted.
d. virtual and upright.
e. none of the above because you do not get an image.
d
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The Ritz combination principle states that the sum of the
A) frequencies of two lines in a spectrum often equal the frequency of a third line. B) energies associated with two lines in a spectrum often equal the energy associated with a third line. C) energy transitions of quantum jumps is consistent with the conservation of energy. D) all of the above E) none of the above
A 3.00-kg stone is dropped from a 39.2 m high building. When the stone has fallen 19.6 m, the magnitude of the impulse it has received from the gravitational force is
a. 9.80 N s. b. 19.6 N s. c. 29.4 N s. d. 58.8 N s. e. 118 N s.
An 10.0-W resistor is dissipating 100 watts. What are the current through it and the difference of potential across it?
a. 31.6 A, 3.16 V c. 3.16 A, 31.6 V b. 10.0 A, 3.16 V d. 3.16 A, 10.0 V
Two children are riding on a merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger linear displacement?
A) Child A B) Child B C) They have the same zero linear displacement. D) They have the same non-zero linear displacement. E) There is not enough information given to answer the question.