Do physicists consider electromagnetic fields to be "real"?
A) No, because they are only an idea, imagined only by the human mind.
B) Yes, because electromagnetic fields contain energy, even though they are not made atoms.
C) Yes, because electromagnetic fields exert forces, even though they are not made of as atoms.
D) No, because electromagnetic fields are not made of any material substance such as atoms.
E) Yes, because electromagnetic fields are made of atoms.
B
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The balloon and the magazine shown in this figure are both electrical insulators. Suppose the magazine was replaced by an uncharged metal sheet of the same size as the magazine. The balloon would:
a. be repelled by the metal sheet. b. be attracted by the metal sheet. c. be unaffected by the metal sheet. d. have all electrical effects neutralized by the presence of the metal. e. acquire the opposite charge because of the metal.
In 400 B.C., a Greek named ______________ championed the idea that if matter were repeatedly cut into smaller divisions, eventually an indivisible particle would be reached
Fill in the blank(s) with correct word
Two resistors having resistances of 5.0 ? and 9.0 ? are connected in parallel. A 4.0-? resistor is then connected in series with the parallel combination. An ideal 6.0-V battery is then connected across the series-parallel combination
What is the current through the 9.0-? resistor? A) 0.35 A B) 0.53 A C) 0.83 A D) 0.30 A E) 0.67 A
Examine flow control from your own perspective. Is it justified, or should the free market reign? Explain your reasons clearly
What will be an ideal response?