What is the reactance of a 1.0-mH inductor at 60 Hz?
A) 0.19 ?
B) 0.38 ?
C) 2.7 ?
D) 5.3 ?
B
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It is likely that both Pluto and Triton were originally ________
Fill in the blank(s) with correct word
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?
a. 18 × 10^4 V b. 4.5 × 10^4 V c. zero d. ?4.5 × 10^4 V
When a container of water is placed on a laboratory scale, the scale reads 120 g. Now a 20-g piece of copper (of density 8.9 g/cm3 ) is suspended from a thread and lowered into the water, not touching the bottom of the container
What will the scale now read? The density of water is 1.0 g/cm3. A) 120 g B) 122 g C) 138 g D) 140 g
The half-life of a muon is 2.20 ms as measured in a stationary reference frame. What is the half life of the muon (in ms) when it is moving with a speed of v = 0.800 c?
a. 8.13 b. 2.75 c. 3.67 d. 15.8 e. 1.32