To connect a pair of resistors so their equivalent resistance (the single resistor having their combined value) will be least, connect them in
A) series.
B) parallel.
C) either of these
Answer: B
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An isolated black hole in empty intergalactic space would be difficult to detect because
a. there would be no stars behind it whose light would be affected by gravitational lensing. b. it could not emit light from inside its event horizon. c. no companion stars would be affected by its gravitational field. d. no matter would be falling into it to create an X-ray-emitting accretion disk. e. All of the other choices are correct.
Which is more likely to cause more damage to skin - a burn caused by water at 100°C or a burn caused by steam at 100°C?
A. The burn caused by water. B. The burn caused by steam. C. There is no difference.
A pickup truck moves at 25 m/s toward the east. Ahmed is standing in the back and throws a baseball in what to him is the southwest direction at 28 m/s (with respect to the truck)
A person at rest on the ground would see the ball moving how fast in what direction?
In general, elements that have four to eight electrons in their valence shell are
a. semimetals. b. metalloids. c. nonmetals. d. metals.