The F Ring around Saturn is maintained by ________
Fill in the blank(s) with correct word
two shepherd moons
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Radiation: A sphere of surface area 1.25 m2 and emissivity 1.0 is at a temperature of 100°C. At what rate does it radiate heat into empty space? (? = 5.67 × 10-8 W/m2 ? K4)
A. 7.1 W B. 0.71 mW C. 1.4 kW D. 9.9 mW E. 3.7 W
A positively charged metal sphere A is brought into contact with an uncharged metal sphere B. As a result:
A) both spheres are positively charged B) A is positively charged and B is neutral C) A is positively charged and B is negatively charged D) A is neutral and B is positively charged E) A is neutral and B is negatively charged
Match the moons listed to the left with the characteristics described in the sentences to the right. Drag words from the left to the blanks on the right. Each moon should be used only once.
The internal energy of a substance can be increased by
a. doing work on it b. letting it do work c. adding heat to it d. extracting heat from it e. none of the above