Because of refraction, a person standing waist deep in a swimming pool appears to have
A) shorter legs.
B) longer legs.
C) thinner legs.
D) none of the above
Answer: A
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A circuit contains a 2.0-M? resistor in series with an uncharged capacitor. When this combination is connected across an ideal battery,
the capacitor reaches 25% of its maximum charge in 1.5 s. What is its capacitance?
A machine gear consists of 0.40 kg of iron and 0.16 kg of copper. How much total heat is generated in the part if its temperature increases by 35°C? (Specific heats of iron and copper are 450 and 390 J/kg • °C, respectively.)
a. 910 J c. 4000 J b. 8500 J d. 5300 J
This diagram represents an edge-on view of our Milky Way Galaxy. Of the four labeled points, which one is located in what we call the halo of the galaxy?
A) point 1 B) point 2 C) point 3 D) point 4
Explain why the observable properties of quasars imply that they are objects from the early Universe controlled by supermassive black holes
What will be an ideal response?