The number of significant figures in 0.40 is
A) one.
B) two.
C) three.
D) four.
E) five.
B
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According to relativity theory, it is possible to reverse time and grow younger when you
A) are near a black hole. B) are near a very large gravitational field. C) travel at nearly the speed of light. D) you can never grow younger. E) none of these
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
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 ?
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
As the block is sliding on the cart,
which object has the larger net
force on it?