Physics Unit31: Nuclear Energy and Radiation

1#

When a target nucleus is bombarded by an appropriate beam ov9f 8dg/pr2dea4s t. bf particles, it is possibpd4 /28bfvg.rs9edatle to produce (1.0 分)

A. a less massive nucleus, but not a more massive one.

B. a more massive nucleus, but not a less massive one.

C. a nucleus with smaller atomic number, but not one with a greater atomic number.

D. a nucleus with greater atomic number, but not one with a smaller atomic number.

E. a nucleus with either greater or smaller atomic number.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本Practice全部题目来源于WebAssign，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

2#

单选题搜藏此题

The mass of a proton mt r*g0,le -upis $1.6726 \times 10^{-27} \; kg$ and the mass of a neutron is $1.6749 \times 10^{-27} \; kg$. A proton captures a neutron forming a deuterium nucleus. One would expect the mass of this nucleus to be (1.0 分)

A. equal to $(1.6726 + 1.6749) \times 10^{-27} \; kg$.

B. less than $(1.6726 + 1.6749) \times 10^{-27} \; kg$.

C. greater than $(1.6726 + 1.6749) \times 10^{-27} \; kg$.

D. any of these; it depends on the energy released during the capture.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

3#

单选题搜藏此题

In a nuclear reaction, what value is conserved in a.b,sq88ecw 8eby tz.addition to electric charge, energy, and momentum.ea8 8 wycz.be8t b,sq? (1.0 分)

A. atomic number

B. neutron number

C. nucleon number

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

4#

单选题搜藏此题

A proton strikes an oxygen-18 nucleus producing fluorine-18 and anotherno;bpj;x g7k g k q6md.t7fnx*09p: od particle. Wha*7bknm0o;fj:k opx x6pt;dq9d. gg7 nt other particle is produced by this nuclear reaction? (1.0 分)

A. a neutron

B. an $\alpha$ particle

C. an $b-$ particle

D. an $b+$ particle

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

5#

单选题搜藏此题

A nuclear reaction is said to be exothermici,i4fut (eru5f 7(rvj if the total kinetic energy is (1.0 分)

A. less after the reaction than before.

B. equal both before and after the reaction.

C. greater after the reaction than before.

D. zero after the reaction.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

6#

单选题搜藏此题

A nuclear reaction is said to be endothermic if the total 2 wbd ry zo.-o)0tagu0kinetic energy is (1.0 分)

A. less after the reaction than before.

B. equal both before and after the reaction.

C. greater after the reaction than before.

D. zero after the reaction.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

7#

单选题搜藏此题

The process during which a heavy nucleus such as uranium splitsd: gpo2 wte+.tes 1 nkd u35yu2bq *xhrqg5)y0 into two intermediate-sized nuclei after being struck by a neu x2530y2u*+w o5 dgh1n:bqytt.) eqpr d ugesktron is referred to as (1.0 分)

A. nuclear fission.

B. nuclear fusion.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

8#

单选题搜藏此题

The process during which small nuclei combine t6 y+stw2zf3 nuo form larger ones is referred to 3z6wf 2nu+yst as (1.0 分)

A. nuclear fission.

B. nuclear fusion.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

9#

单选题搜藏此题

How does the total mass of the products of a nuclear fisa2bosn bstp67(jpio 6--oeqv.xn ,) hsion reaction compare to the mass of the original elementsao n7qnp6v b2otpjbs -h6x. (ois-e) ,? (1.0 分)

A. greater

B. less

C. the same

D. varies according to the reaction

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

10#

单选题搜藏此题

How does the mass of the products of a nuclekkku0 cl9ss; 8ar fusion reaction compare to the mass okus 08s9c ;kklf the original elements? (1.0 分)

A. greater

B. less

C. the same

D. varies according to the reaction

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

11#

单选题搜藏此题

When light elements such as hydrogen undergo fusionw)eepa+qs( ,7 ulgi9n, (1.0 分)

A. there is a loss of mass.

B. there is an increase in mass.

C. there is no change in mass.

D. electric charge can be annihilated.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

12#

单选题搜藏此题

The fuel for nuclear.arfhxu r)2it ju*33 i fission is (1.0 分)

A. Hydrogen

B. Helium

C. Uranium

D. any radioactive material

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

13#

单选题搜藏此题

The fuel for nuclear fusion in the ccm-k- tde7b a;enter of the Sun is (1.0 分)

A. Hydrogen

B. Helium

C. Uranium

D. any radioactive material

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

14#

单选题搜藏此题

The energy radiated by a star, such as the Sun, results fr9 /pjp j+ut3tfc f.4arom (1.0 分)

A. beta decay.

B. alpha decay.

C. fission reactions.

D. fusion reactions.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

15#

单选题搜藏此题

What is the source of the ocm+u 4 8l.:2gwif kmtenergy the Sun radiates to us? (1.0 分)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本Practice全部题目来源于WebAssign，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

16#

单选题搜藏此题

What is the principle difference between a hydrogen bomb and a uranium bomr*tphnzj2 f*rdgdb q ) o+s582wt4 go:b? (1.0 分)

A. A uranium bomb is an atomic bomb, and a hydrogen bomb is a nuclear bomb.

B. A uranium bomb utilizes a fission reaction whereas a hydrogen bomb utilizes a fusion reaction.

C. Both work on the same principle, but the hydrogen bomb has a higher yield.

D. A hydrogen bomb converts mass into energy, whereas a uranium bomb does not.

E. One results in radioactive fallout, and the other does not.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

17#

单选题搜藏此题

One sometimes hears referenceyi.sbhiz 79*6c2q 2rwx9u6beqoj q( f to a "20-kiloton" bomb. What does this mean? (1.0 分)

A. It means 20,000 tons of nuclear explosive is used in the bomb.

B. It means that the number of "fissile" nuclei is equal to the number of trinitrotoluene molecules in 20,000 tons of TNT explosive.

C. It means that the total weight of the bomb (not just the uranium) is 20,000 tons.

D. It means that the energy released by the bomb is equal to the energy released when 20,000 tons of TNT is exploded.

E. This refers to the maximum pressure generated by the bomb when it explodes.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

18#

单选题搜藏此题

What is the meaning of the term "criticz8 hmux- qt;1hal mass"? (1.0 分)

A. This refers to the mass of the "critical" elements in a reactor, i.e., the uranium or plutonium.

B. This refers to the minimum amount of fissionable material required to sustain a chain reaction.

C. This is the amount of mass needed to make a power reactor economically feasible.

D. This is the material which is just on the verge of becoming radioactive.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

19#

单选题搜藏此题

A chain reaction can21cfym yq5m8b occur (1.0 分)

A. in any uranium core.

B. when critical mass is reached.

C. in the center of the Sun.

D. when the coolant is too hot.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

20#

单选题搜藏此题

The chief hazard of radi x7k)ek)z(hkcec9 +ccation damage to living cells is (1.0 分)

A. due to ionization.

B. due to heating.

C. due to the creation of chemical impurities.

D. the creation of new isotopes within the body.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

21#

单选题搜藏此题

What is necessary to stop b k*jozw)5b 5ph gw+t r7ysd)i9eta particles? (1.0 分)

A. air alone

B. paper

C. metal foil

D. thick metal

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

22#

单选题搜藏此题

What is created in pair productjy+:y 2 n;bforv6ze 1yion? (1.0 分)

A. a proton and a positron

B. an electron and an antiproton

C. an electron and a positron

D. an electron and a photon

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

23#

单选题搜藏此题

All of the following are units used to describe ray7hm5jy 5p6(lv so1 la*+klav diation dosage in humans except5a(l7o hyl5lv myv jp*1ks6a+ (1.0 分)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

24#

单选题搜藏此题

A unit that measures the effective dose of riz59c2r; /c+ t;w aeahb ooyj6adiation in a human is the (1.0 分)

A. curie.

B. RBE.

C. rad.

D. rem.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

25#

单选题搜藏此题

When lead-207 (Z = 82) is bombarded with neeu +za2b13ryx.y ae .gutrons, it can change into (1.0 分)

A. lead-208.

B. lead-206.

C. tellurium-208 (Z = 81).

D. bismuth-208 (Z = 83).

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本Practice全部题目来源于WebAssign，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

26#

单选题搜藏此题

In the fission react4,c 4hijgg4t tion $^{235}U \;+\; ^{1}n \rightarrow ^{141}Ba \;+\; ^{92}Kr \;+\; neutrons$, the number of neutrons produced is (1.0 分)

A. zero.

B. 1.

C. 2.

D. 3.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

27#

单选题搜藏此题

Complete the following nuclear reacti5);p zxo8kruirq yl.*on: $^{16}_8 O \;+\; ^1_0 n \rightarrow \;\;\;\;\;\; \;+\; ^4_2 He$ (1.0 分)

A. $^{12} C$

B. $^{13} C$

C. $^{14} C$

D. $^{15} C$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本Practice全部题目来源于WebAssign，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

28#

单选题搜藏此题

Complete the followi. hywn7ylq vd -+gsx6;ng nuclear reaction: $^{16}_8 O \;+\; ^4_2 He \rightarrow \;\;\;\;\;\; \;+\; ^{19}_{10} Ne$ (1.0 分)

A. $^1 p$

B. $^1 n$

C. $^2 H$

D. $^3 H$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本Practice全部题目来源于WebAssign，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

29#

单选题搜藏此题

Complete the following nuclear reaction:0mktl50me( y5d u1oq 6 cc-iwk $^{38}_{19} K \;+\; ^1_1 H \rightarrow \;\;\;\;\;\; \;+\; ^{38}_{20} Ca$ (1.0 分)

A. $^1 p$

B. $^1 n$

C. $^2 H$

D. $^3 H$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

30#

单选题搜藏此题

Complete the following nucl /;;o(voeyw erear reaction: $^3_1 H \;+\; ^3_1 H \rightarrow \;\;\;\;\;\; \;+\; ^4_2 He$ (1.0 分)

A. 2($^1 p$)

B. 2($^1 n$)

C. $^2 H$

D. $^3 H$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

31#

单选题搜藏此题

Complete the following nuclear reacqbj z )dg/ k :l;cy83ma7azli5tion: $^{27}_{13} Al (\alpha, n)$ produces (1.0 分)

A. $^{28} P$

B. $^{29} P$

C. $^{30} P$

D. $^{31} P$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本Practice全部题目来源于WebAssign，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

32#

单选题搜藏此题

The Q value for a particular reaction is -2.4 MeV, and the reactioe 05:t 6emcwjxvz9n y,n's threshold energy is 9.60 MeV. What is the ratio of the mass of the incident pxcw5v:zej 0 eyt 9m,n6article to the mass of the stationary target nucleus? (1.0 分)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

33#

单选题搜藏此题

Find the Q value of the following reaction: 6x y35jts fu,d(h*n of$^{14}_7 N \;+\; ^4_2 He \rightarrow ^{17}_8 O \;+\; ^1_1 H$
The isotopic mass for $^{14}_7 N$ is $14.003074 u$
The isotopic mass for $^4_2 He$ is $4.002603 u$
The isotopic mass for $^{17}_8 O$ is $16,999131 u$
The isotopic mass for $^1_1 H$ is $1.007825 u$ (1.0 分)

A. -0.001279 u

B. -0.002179 u

C. -0.007219 u

D. -.0.009721 u

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

34#

单选题搜藏此题

Find the Q value of the following reaction:r )3xe;ff9ssojaig; ( $^{14}_7 N \;+\; ^4_2 He \rightarrow ^{17}_8 O \;+\; ^1_1 H$
The isotopic mass for $^{14}_7 N$ is $14.003074 u$
The isotopic mass for $^4_2 He$ is $4.002603 u$
The isotopic mass for $^{17}_8 O$ is $16,999131 u$
The isotopic mass for $^1_1 H$ is $1.007825 u$ (1.0 分)

A. $1.191 \; MeV$

B. $-1.191 \; MeV$

C. $1.279 \times 10^{-3} \; MeV$

D. $-1.279 \times 10^{-3} \; MeV$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

35#

单选题搜藏此题

What is the Q value for dsz*e.o*m 7dtdz4 , kpq1 x2ptthe following reaction? $^{7} Li + ^1 p \rightarrow ^4 He + ^4 He$
The isotopic mass for $^7 Li$ is $7.016005 u$
The isotopic mass for $^1 p$ is $1.007825 u$
The isotopic mass for $^4 He$ is $4.002603 u$ (1.0 分)

A. $13.57 \; MeV$

B. $15.37 \; MeV$

C. $17.35 \; MeV$

D. $17.53 \; MeV$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本Practice全部题目来源于WebAssign，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

36#

单选题搜藏此题

What is the energy of reaction oida /n-ctyf6 *f the process $^9_4 Be \;(\alpha, n)\; ^{12}_6 C$? (1.0 分)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

37#

单选题搜藏此题

What is the energy released (positive) or absorbed (negative) in the folloi+- l6g ahym)dwing rey-) dm hil6ga+action? $^3 H \;+\; ^3 H = ^4 He \;+\; 2(^1 n)$
The isotopic mass for $^3H$ is 3.016049 u
The isotopic mass for $^4He$ is 4.002603 u
The isotopic mass for $^1n$ is 1.008665 u (1.0 分)

A. $0.0122 \; MeV$

B. $-0.0122 \; MeV$

C. $11.3 \; MeV$

D. $-11.3\; MeV$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

38#

单选题搜藏此题

An X-ray technician takes1gt 6sw7q nt,b5py be8 an average of ten X-rays per day and receives 2.5 mrad per X-ray. What is the totabt6, e spq tw1by785gnl dose the technician receives in 250 working days? (1.0 分)

A. $2.50 \; rem$

B. $5.00 \; rem$

C. $6.25 \; rem$

D. $7.75 \; rem$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

		Remember me	Forgot password?
Password			Register Now

Unused Images

Used Images in Current Log

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

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

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