Physics Unit29: Molecules and Solids

?作业考试练习?通用国际物理?Physics Unit29: Molecules and Solids

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习题练习：Physics Unit29: Molecules and Solids

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作者: admin 发布日期: 2023-05-01 13:57 总分: 27分得分: _____________

答题人: 匿名未登录开始时间: 23年05月01日 13:57 切换到: 整卷模式

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

Covalent bonding is caused byv6dp3p ha)pt 4d7o :rk6dn8nc

A. the sharing of electrons between atoms.

B. the transfer of electrons between atoms.

C. unequal charge distributions around neutral molecules.

D. atoms bonding to hydrogen molecules.

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

Ionic bonding is caused l26/ yx ejdo0mcd z46v7-j3 b7ndbb bsby

A. the sharing of electrons between atoms.

B. the transfer of electrons between atoms.

C. unequal charge distributions around neutral molecules.

D. atoms bonding to hydrogen molecules.

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

The bond energy for a hydrogen molecule isgck0:w5sl2g l6 wawx)

A. $2.5 \; eV$

B. $3.5 \; eV$

C. $4.5 \; eV$

D. $5.5 \; eV$

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

Van der Waals bonding is caused co. 3 jhffpqqe ,h31xp+h3n)p by

A. the sharing of electrons between atoms.

B. the transfer of electrons between atoms.

C. unequal charge distribution around neutral molecules.

D. atoms bonding to hydrogen molecules.

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

In general, which of the following is the stronge2 f,ha2h n(gmf3i-q4zh 1, obce0shvp st bond?

A. hydrogen bond

B. van der Waals bond

C. ionic bond

D. covalent bond

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

In general, which of the follof4yb q )vw /1:j7owb lj6ddside93v4 bwing is the weakest bond?

A. hydrogen bond

B. van der Waals bond

C. ionic bond

D. covalent bond

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

For a diatomic quantum mechanical rotator, the energy difference between adjieqf0 9 1d4 8os03c3aurlpzd jacent energy leveo0lcuqpj4z19 rd0s3ae3 df i8 ls

A. increases as L increases.

B. decreases as L increases.

C. is constant for all L.

D. varies randomly as L increases.

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic quantum mechanical rotator in tf-,: fovtcqlb (f,5b qhe L = 1 quantum state has energy E. The same rotator in the L = 2 quantum stcvf ltoq ,,-5b(qbf: fate will have energy

A. 2E.

B. 3E.

C. 6E.

D. none of the given answers

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

In its lowest quantum state, the energyz9 twyjgr7/k4+fxhy 4 of a diatomic harmonic oscillator is

A. (1/4)hf.

B. (1/2)hf.

C. hf.

D. (3/2)hf.

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

For a diatomic quantum mechanicare ad/ty*/bkae*-u(1 3i wvwpl vibrator, the energy difference between adjacent awdw( iy k*r/1 3tevu-e/ pa*bquantum states

A. increases as v increases.

B. decreases as v increases.

C. is constant for all values of v.

D. varies randomly as v increases.

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In its lowest quantukw;d5gss z 9s+h1nb e w;7xnlf/hn0x;m state, a diatomic quantum mechanical rotator has a rotational en7kbz ;;9d ghw0nxx ;en snf1s+w5l s/hergy of

A. zero.

B. $h/2 \pi I$.

C. $h/\pi I$.

D. none of the given answers

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic quantum mechanical vi8j1 fq;o0zfwuwel4,d brator in its ground state has energy E. This same viw1f0 ulewd f;jzoq, 84brator in its third state has energy

A. E.

B. 3E.

C. 5E.

D. 7E.

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Metallic bonding is -o7ywslxo yg s/+(4ndf5n b(f6cp8 adcaused by

A. the sharing of electrons by all atoms.

B. the transfer of electrons between atoms.

C. unequal charge distributions around neutral molecules.

D. atoms bonding to hydrogen molecules.

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a good conductor, the highes1;q h7ms ll zk*cl ziq9:5(ssit energy band containing electrons is

A. only partially filled.

B. completely filled.

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a good insulator, the highest energy band containing electrons: yjf2n/s ab 9o1mtl6c, called the valencem2cobsj ay6 f/19tn: l band, is

A. only partially filled.

B. completely filled.

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An n-type semiconductor is produced bjogrf y+-.hh4 y

A. doping the host crystal with donor impurities.

B. doping the host crystal with accepter impurities.

C. pure crystals of germanium.

D. none of the given answers

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A p-type semiconductor is pdg: 5-yddl6v hroduced by

A. doping the host crystal with donor impurities.

B. doping the host crystal with accepter impurities.

C. pure crystals of germanium.

D. none of the given answers

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18#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a p-type semiconddellimn)nu0y-a .o 9: uctor, a hole is

A. a donor atom.

B. an extra electron supplied by a donor atom.

C. a missing atom in the crystalline structure.

D. a region where an electron is missing.

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19#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When a voltage is applmx /u.i0xtv on). ed+lied across a p-type semiconductor, the holes

A. are destroyed.

B. move toward the positive electrode.

C. move toward the negative electrode.

D. do not move.

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20#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If a battery is connected to a diode with the pq yw/+, lazmq(99sp5)i*a ijk-dske jositive terminal to the p side an 9*+qw kzs()jkmja piay ,s9eld-q5/id the negative terminal to the n side, then diode is said to be

A. forward biased.

B. reversed biased.

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21#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A simple junction transistor consists of three semiconductor sections co:rjgh(wpxvp 52yv :0f nsisting r h(xvv fp5 :jg2yp0:wof

A. pnp semiconductors.

B. npn semiconductors.

C. either pnp or npn semiconductors.

D. none of the given answers

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22#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic quantum mechanical oscillator has a moment of i99-i.zjul ucsnertia of $7.73 \times 10^{-45} \; kg \cdot m^{2}$. What is the rotational energy in the quantum state characterized by L = 2?

A. $2.27 \times 10^{-5} \; eV$

B. $2.72 \times 10^{-5} \; eV$

C. $7.22 \times 10^{-5} \; eV$

D. $8.71 \times 10^{-5} \; eV$

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23#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic molecule he*qbz0yk f9 2ias $2.6 \times 10^{-5} \; eV$ of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 1 quantum state?

A. $3.4 \times 10^{-6} \; eV$

B. $5.3 \times 10^{-6} \; eV$

C. $7.8 \times 10^{-6} \; eV$

D. $8.7 \times 10^{-6} \; eV$

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24#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic molecule has 1a sya(*s:ovb4vky ) s$18 \times 10^{-5} \; eV$ of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 0 quantum state?

A. $9.0 \times 10^{-5} \; eV$

B. $6.0 \times 10^{-5} \; eV$

C. $3.0 \times 10^{-5} \; eV$

D. $0 \; eV$

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25#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Estimate the rotational energy (in eV) for a diatomic hydrog)ro*+nc z2ry7a.;uebpt e vs*5t m4 wzen molecule in the L = 2 quantum sve 5t4snbmuw e *7 rryza)t+opz.c *2;tate. (The equilibrium separation for the H2 molecule is 0.075 nm.)

A. $0.011 \; eV$

B. $0.022 \; eV$

C. $0.033 \; eV$

D. $0.044 \; eV$

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26#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diatomic molecule is vibrating in the v = 1 quantum state with a frequen/xvdi/i bd5zlc )zy1 nwc5v;7cy of wd7v ilnci5cv /;z5y/ x)dbz 1$2.0 \times 10^{13} \; Hz$. What is the energy of vibration?

A. $0.041 \; eV$

B. $0.083 \; eV$

C. $0.12 \; eV$

D. $0.17 \; eV$

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27#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The energy gap between the valence and conduction bandr 7a68lxlrm2m7 gymlzo,ho.) s in a certain semiconductor is 1.25 eV. What is the threshold wavelength for optical absorption in this substance 2mlhm.o x ,lozr l7amr786)yg?

A. $599 \; nm$

B. $959 \; nm$

C. $873 \; nm$

D. $995 \; nm$

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