Pluto was discovered in 1930 by ________
Fill in the blank(s) with correct word
Clyde Tombaugh
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Discuss the difference between the Universe and the observable Universe
What will be an ideal response?
A certain crystal has an interatomic spacing of 0.442 nm. A beam of neutrons moving with a speed of 1640 m/s is diffracted from the crystal. What is the angle of the second interference maximum?
A) 17.0° B) 21.0° C) 33.0° D) 60.0° E) 90.0°
A transverse wave is traveling on a string stretched along the horizontal x-axis. The equation for the vertical displacement y of the string is given by y = 0.0020 cos[?(15x - 52t)], where all quantities are in SI units
The maximum speed of a particle of the string is closest to A) 0.33 m/s. B) 0.43 m/s. C) 0.64 m/s. D) 0.53 m/s. E) 0.74 m/s.
Iron atoms have a greater tendency to oxidize than do copper atoms. Is this good news or bad news for a home in which much of the plumbing consists of iron and copper pipes connected together? Explain
A) This is bad news, since the iron atoms will be reduced by the copper atoms. B) This is not a problem, since the strength of the copper will make up for the weakness of the iron. C) It is bad news. The iron atoms will lose electrons to the copper atoms, which will pass those electrons onto oxygen atoms that are in contact with the surface. D) This is not a problem since any electrons lost will be replaced by copper electrons.