Series/Parallel Circuits: A15-? resistor is connected in parallel with a 30-? resistor. If this combination is now connected in series with an ideal 9.0-V battery and a 20-? resistor, what is the current through the 15-? resistor?
A. 0.10 A
B. 0.13 A
C. 0.20 A
D. 0.26 A
Answer: C
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a. has more distinctive zones and belts than Jupiter's. b. is rich in free oxygen. c. is hazy above the clouds. d. is all of the above e. is none of the above
The principle of Occam's Razor states that
A) scientific explanations may invoke supernatural causes if no other causes are found. B) only a model that has survived repeated observational tests deserves to be called a scientific theory. C) no scientific theory, no matter how well tested, can ever be proved absolutely true. D) in explaining natural phenomena, the simplest explanation consistent with the observations is to be preferred. E) while personal biases may influence individual scientists, the process of science itself can uncover these biases.
A stack 60 m high by 5 m in diameter has an average temperature of 300ºC on its outer surface when exhaust gases pass through it. Estimate the heat loss from the stack into still air at 25ºC.
What will be an ideal response?
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Answer the following statement true (T) or false (F)