Physics, 31.07.2019 11:30, hamada11617
What conclusions can be drawn about the existence of nitrogen-14 and nitrogen-15? a) they are isotopes of nitrogen and they contain the same number of protons and electrons but each contains a different number of neutrons - 7 and 8 respectively. b) they are the same form of nitrogen and they include the same number of electrons and neutrons but each contains a different number of protons - 7 and 8 respectively. c) they are several allotropes of nitrogen and they accommodate the same number of neutrons but each contains a different numbers of protons and electrons - 7 and 8 respectively. d) they are different configurations of nitrogen and they consist of the same number of protons and neutrons but each contains a different number of electrons - 7 and 8 respectively. eliminate
Answers: 1
Physics, 23.06.2019 01:30, aliciabenitez
Amerry-go-round of radius r, shown in the figure, is rotating at constant angular speed. the friction in its bearings is so small that it can be ignored. a sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. the sandbag does not slip or roll upon contact with the merry-go-round. how would you rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round from largest to smallest. a) m = 10kg, r = 0.25r b) m = 20kg, r = 0.25r c) m = 10kg, r = 0.50r d) m = 10kg, r = 1.0r e) m = 15kg, r = 0.75r f) m = 40kg, r = 0.25r
Answers: 1
What conclusions can be drawn about the existence of nitrogen-14 and nitrogen-15? a) they are isoto...
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