The second shell of an atom can hold a maximum of ______________ electrons
Fill in the blank(s) with correct word
8
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Impulse: A 0.17-kg baseball is thrown with a speed of 38 m/s and it is hit straight back toward the pitcher with a speed of 62 m/s. What is the magnitude of the impulse exerted upon the ball by the bat?
Fill in the blank(s) with the appropriate word(s).
Which uranium isotope has the largest cross section for slow neutrons?
A) U-236 B) U-238 C) U-237 D) U-235 E) U-239
What kind of star is most likely to become a white-dwarf supernova?
A) a binary M star B) an O star C) a star like our Sun D) a pulsar E) a white dwarf star with a red giant binary companion
A cup of water with ice floating in it is at the level of the brim (near to overflowing). As the ice melts, what will the water in the cup do?
1.It will spill out of the cup. 2.It will drop in level. 3.It will stay at the same level, right at the cup's brim. 4.It is impossible to determine.