In the double-slit experiment with electrons,
A) the impact point of each electron cannot be predicted, and neither can the overall pattern of impact points.
B) the impact point of each electron can be predicted, but the overall pattern of impact points cannot be predicted.
C) the impact point of each electron cannot be predicted, but the overall pattern can be predicted.
D) the impact point of each electron can be predicted, and so can the overall pattern of impact points of a large number of electrons.
E) electrons turn into giraffes.
C
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Compared to the star it evolved from, a white dwarf is
A) hotter and brighter. B) hotter and dimmer. C) cooler and brighter. D) cooler and dimmer. E) the same temperature and brightness.
The linear momentum of a 40.0 kg object moving around a 90.0 m circle at a constant speed of 7.60 m/s is
a. 0.0 kg m/s b. 304 kg m/s c. 1155 kg m/s d. 27360 kg m/s
A block is on a frictionless horizontal table, on earth. This block accelerates at 1.9 m/ when a horizontal force is applied to it. The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s2
What is the weight of the block on the moon? A) 77 N B) 67 N C) 58 N D) 48 N E) 39 N
Which one of the following in not one of the drawbacks to the use of coal, i.e., which of the following is false?
A) We will run short on coal resources before long. B) Coal mining causes destruction of the land. C) Coal burning causes pollution. D) Coal burning contributes to the greenhouse effect thus heating Earth. E) Coal mining causes a large number of miner's deaths due to miner's diseases.