The number of significant figures in 0.40 is

A) one.
B) two.
C) three.
D) four.
E) five.


B

Physics & Space Science

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According to relativity theory, it is possible to reverse time and grow younger when you

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What do we call a small piece of solar system debris that has fallen to the surface of Earth?

A) Iridium B) A comet C) A meteor D) A meteorite E) A shooting star

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A 120-V rms voltage at 60.0 Hz is applied across an inductor, a capacitor, and a resistor in series. If the rms value of the current in this circuit is 0.600 A, what is the impedance of this circuit?

A) 200 ? B) 141 ? C) 20 4 ? D) 120 ? E) 100 ?

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A 500-g block traveling at 60 cm/s slides onto a 1-kg cart as shown. The block stops sliding before reaching the end of the cart

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1.the cart 2.the block 3.neither; the net force is the same 4.impossible to determine

Physics & Space Science