Imagine a Star Wars type spaceship in orbit around a planet. Its engine suffers a severe malfunction, and explodes. What is the most physically realistic depiction of this event?
A) The spacecraft burns up in a giant ?reball.
B) The spacecraft breaks apart, and the pieces continue to orbit the planet.
C) The spacecraft breaks in half and begins to sink down into the planet, like a sinking aircraft carrier.
B
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Solders are made from metals with a(n) _____________phase diagram, because alloys of the metals melt at a temperature lower than that of either of the two components individually.
Fill in the blank(s) with the appropriate word(s).
What are Kepler's three laws of planetary motion?
What will be an ideal response?
Two large parallel metal plates are uniformly and oppositely charged and the electric field between them is 7.6 × 106 N/C
(a) What is the charge density on each plate? (b) If the very large charged plates are moved 2 times farther apart, what is the electric field between the plates now?
A person who weighs 550 N empties her lungs as much as possible and is then completely immersed in water (of density 1000 kg/m3 ) while suspended from a harness. Her apparent weight is now 21.2 N. What is her density?
A) 1040 kg/m3 B) 1030 kg/m3 C) 1050 kg/m3 D) 56.1 kg/m3 E) 960 kg/m3