The magnetic field of a bar magnet is similar to that produced by ________

a. a current carrying wire shaped like a coil
b. a horseshoe magnet
c. a straight current carrying wire


a

Physics & Space Science

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Which contains more atoms?

A) 1 kg of hydrogen B) 1 kg of iron C) both contain the same

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Scientists use the metric system chiefly because it is more accurate than the English system

A) True B) False

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Two identical particles move toward each other, one twice as fast as the other. Just before they collide, one has a kinetic energy of 25 J and the other 50 J. At this instant their total kinetic energy is

A) 25 J. B) 50 J. C) 75 J. D) none of the above E) need more information

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Saturn's rings are extremely old, possibly older than four billion years

Indicate whether the statement is true or false

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