Serway_CP_poll_ch30

# Serway_CP_poll_ch30 - How much kinetic energy must a...

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= 1.6 x 10 -19 C) have to approach within 10 -14 m of another deuterium ion? [k = 9 x 10 9 N-m 2 /C 2 and 1 MeV = 1.6 x 10 -13 J] 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 30 KeV 2. 50 KeV 3. 70 KeV 4. 140 KeV

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a plasma with a temperature of 10 8 K? (k B = 1.38 x 10 -23 J/K and m D = 2 x 1.66 x 10 -27 kg) 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 1.12 x 10 6 m/s 2. 0.93 x 10 5 m/s 3. 0.46 x 10 5 m/s 4. 2.32 x 10 4 m/s
One in 6500 water molecules (on average) contains a from 1 m 3 of water and then reacted, how much energy could be obtained? (Each D-D fusion liberates 3.65 MeV of energy, 1 MeV = 1.6 x 10 -13 J) 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 8.0 x 10 10 J 2. 9.6 x 10 10 J 3. 4.8 x 10 11 J 4. 1.5 x 10 12 J

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The reason that a thermonuclear fusion reaction cannot be maintained in the oceans of the earth is because? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. the temperature is not high enough. 2. the density is not high enough. 3. there is insufficient deuterium in the ocean. 4. the deuterium in the ocean is not radioactive.
to confine a plasma for nuclear fusion because, if the plasma touched the walls of a container, the nuclear fusion reaction would have to stop because? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. the plasma would become cooler. 2. the plasma would melt the walls. 3. the walls would become radioactive. 4. the walls would not be strong enough to contain the plasma.

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and a star will form only when both the temperature and density are sufficiently high. In the birth of a star, 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. gravity produces the initial required high temperature and density. 2. nuclear reactions produce the initial high temperature. 3. nuclear reactions produce the initial required high density. 4. nuclear reactions produce the initial required high temperature and density.
Which of the following is not true of neutrinos? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. spinless 2. chargeless 3. massless 4. lepton

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reactions cannot occur? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. p + p¯→ 2g 2. g + p→ n + p o 3. p o + n → K + 4. p + + p → K + + S +
reactions cannot occur? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. p + n → p + p + p¯ 2. n → p + e ¯ + v e ¯ 3. µ¯ → e ¯ + v e ¯ + v µ 4. p¯ → µ¯ + v e

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The attractive force between protons and neutrons in the nucleus is brought about by the exchange of a virtual pi-meson (mp = 140 MeV/c 2 ). Estimate the longest time a p o can exist in accordance with the uncertainty principle DEDt = Ç. (Ç = 1.054 x 10
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## This note was uploaded on 01/19/2010 for the course PHYS 200 taught by Professor Davies during the Spring '08 term at Roger Williams.

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Serway_CP_poll_ch30 - How much kinetic energy must a...

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