If a copper alloy is in the (O) condition, it is _________.
Fill in the blank(s) with the appropriate word(s).
annealed
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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.
Why might the presence of a giant planet be both good and bad news for life on a terrestrial planet in another solar system?
What will be an ideal response?
A key component of one type of spectroscope for visible radiation is the
A) filter for separating the different gases. B) magnet for bending the radiation beam. C) electrostatic plate for bending and separating the radiation beam. D) prism for separating the radiation beam. E) mirror for separating the radiation beam.
A student adds two vectors with magnitudes of 200 and 70 . Which one of the following is the only possible choice for the magnitude of their sum?
a. 100 b. 280 c. 200 d. 70