Metric System: The number 0.00325 × 10-8 cm can be expressed in millimeters as
A. 3.25 × 10-12 mm.
B. 3.25 × 10-11 mm.
C. 3.25 × 10-10 mm.
D. 3.25 × 10-9 mm.
Answer: C
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A. 1 m from the floor B. 50 cm from the floor C. 25 cm from the floor D. at the bottom of the mirror E. 1.5 m from the floor
A bat detects the location of a moth by using echo location. If the moth is foolishly flying towards the bat, the frequency of the reflected sound the bat hears
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Four point charges are on the rim of a circle of radius 10 cm. The charges are (in ?C) +0.50, +1.5, ?1.0, ?0.50 . If the electrical potential at the circle's center due to the +0.5 charge alone is 4.5 × 10^4 V, what is the total potential at the center due to the four charges combined?
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What is meant by a system? By a body?
What will be an ideal response?