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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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
Physics & Space Science
Which contains more atoms?
A) 1 kg of hydrogen B) 1 kg of iron C) both contain the same
Physics & Space Science
Saturn's rings are extremely old, possibly older than four billion years
Indicate whether the statement is true or false
Physics & Space Science
Scientists use the metric system chiefly because it is more accurate than the English system
A) True B) False
Physics & Space Science