The supernova of 1054 AD produced:
A) a remnant still visible to the naked eye, the Crab Nebula, M-1.
B) a pulsar with a period of 33 milliseconds, visible optically.
C) the closest known neutron star to our Sun.
D) the most famous black hole.
E) no remaining visible trace, as it was a type I supernova.
B
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Storing____________________ attributes requires constant maintenance.
a) multi-valued b) derived c) single-valued d) composite
A neon light (thin hot neon gas in a sealed tube) gives us:
A) a continuous spectrum, since the neon is hot enough to glow. B) a few bright emission lines, telling us the gas is neon. C) a continuum, with dark lines identifying the neon atoms that are present. D) a lot of random bright red lines due to the motion of the hot atoms. E) nothing visible to us, but a lot of infrared lines as heat.
A pendulum consists of a 2.0-kg block hanging on a 1.5-m length string. A 10-g bullet moving with a horizontal velocity of 900 m/s strikes, passes through, and emerges from the block (initially at rest) with a horizontal velocity of 300 m/s. To what maximum height above its initial position will the block swing?
a. 32 cm b. 38 cm c. 46 cm d. 27 cm e. 9 cm
What forms of electromagnetic radiation from the Sun's emissions do we experience here on Earth? Illustrate how we know this to be the case with one practical example for each form
What will be an ideal response?