Physics Unit27: Early Quantum Theory and Models of the Atom

1#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In a pair of accelerating plates, such as found inside a CRT, the electrons,cjkfg;*wum75fnj0r5ct-o, cvd zv* are emittnc,5uk- ,wg fdtcc;*o z0fvvj7jrm *5ed

A. from the cathode which is positive, toward the anode which is positive.

B. from the cathode which is negative, toward the anode which is positive.

C. from the anode which is positive, toward the cathode which is negative.

D. from the anode which is negative, toward the cathode which is positive.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

2#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A blackbody is an ideal system thatvj(. 8zjm hcd+

A. absorbs 100% of the light incident upon it, but cannot emit light of its own (i.e., a "black" body).

B. emits 100% of the light it generates, but cannot absorb radiation of its own.

C. either absorbs 100% of the light incident upon it, or emits 100% of the radiation it generates.

D. absorbs 50% of the light incident upon it, and emits 50% of the radiation it generates.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

3#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which color in the visible spectrum is associated wi rh 75 xd4,doitb/l*ssth the lowest temperature?

A. blue

B. green

C. orange

D. red

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

4#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Planck's constant

A. sets an upper limit to the amount of energy that can be absorbed or emitted.

B. sets a lower limit to the amount of energy that can be absorbed or emitted.

C. relates mass to energy.

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:

Correct Answer:

Join the discussion for this question

Mark Problem

5#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The ratio of energy to frequency for a givenqg 6n izsp(0++qb1udy photon gives

A. its amplitude.

B. its velocity.

C. Planck's constant.

D. its work function.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

6#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The fundamental SI units of Planck's constant jeox-zv qa2 -/are

A. $kg \cdot m/s$.

B. $kg \cdot m^{2}/s$.

C. $kg \cdot m/s^2$.

D. $kg \cdot m^{2}/s^2$.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

7#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Planck's constant has a value 7+dxp 3yo-d8zfbn el2 q b8-guof

A. $1.055 \times 10^{-34} \; J \cdot s$.

B. $6.626 \times 10^{-34} \; J \cdot s$.

C. $8.85 \times 10^{-12} \; J \cdot s$.

D. $8.988 \times 10^{9} \; J \cdot s$.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

8#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A photon is a particvi7n+pzum4mh(xa(n5q7 (8q qc -r muple that

A. has zero electric charge.

B. has zero electric field associated with it.

C. cannot travel in a vacuum.

D. has a velocity in a vacuum that varies with the photon frequency.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

9#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which of the following is an accurate ad ifb h0jqp 57 pwya,58az4r4statement?

A. In vacuum, ultraviolet photons travel faster than infrared photons.

B. Photons can have positive or negative charge.

C. An ultraviolet photon has more energy than an infrared photon.

D. Photons do not have momentum (i.e., they cannot exert pressure on things).

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

10#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is a photon?

A. an electron in an excited state

B. a small packet of electromagnetic energy that has particle-like properties

C. one form of a nucleon, one of the particles that makes up the nucleus

D. an electron that has been made electrically neutral

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

11#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The energy of a photon depends o4,,w sx+n xpfpn

A. its amplitude.

B. its velocity.

C. its frequency.

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:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

12#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If the wavelength of a photon is halved, by what factor does its energy chan: .gjm b5t,cj/q dwi7lqoto6gn0ba v. vy(s7/ge?

A. 4

B. 2

C. 1/4

D. 1/2

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

13#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which color of light has tv, d/emitgo7l ky3m 09: sfoo.he lowest energy photons?

A. red

B. yellow

C. green

D. blue

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

14#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The photoelectric effect is exp8jc csxxkuy3p8ok w wo htr,.7t:9:r4 lainable assuming

A. that light has a wave nature.

B. that light has a particle nature.

C. that light has a wave nature and a particle nature.

D. none of the above

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

15#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In order for a photon to eject an electron from a metal'0wi,qehao0 lx0kg mqm ++r .dj3le.(ks surface in the photoelectric effect, th3 kk imedq,e 0mah.0qrg l+0l+ .jo(xwe photon's

A. frequency must be greater than a certain minimum value.

B. speed must be greater than a certain minimum value.

C. wavelength must be greater than a certain minimum value.

D. momentum must be zero.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

16#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The kinetic energy of the photoelectron deh9zhd pa;m i3m- zl.+ypends on which of the following?

A. intensity of light

B. duration of illumination

C. wavelength of light

D. angle of illumination

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

17#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A beam of red light and a beam of violet light each demnkc*29oy .yix/u5p k2j*e mpliver the same power on a surfaccpn e*/m ky.p2o*5uk 9jxm2yie. For which beam is the number of photons hitting the surface per second the greatest?

A. the red beam

B. the violet beam

C. The number of photons per second is the same for both beams.

D. This cannot be answered without knowing just what the light intensity is.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

18#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A metal surface is illuminated wit)8 s41mjfd2v m5yve tj( 7mp 4aygc:hah blue light and electrons are ejected at a given rate each with a certain amount of energy. If the intensity of the blue light y(eapy v2v5s mf 84 ja7tdmg)jm:c1h4is increased, electrons are ejected

A. at the same rate, but with more energy per electron.

B. at the same rate, but with less energy per electron.

C. at an increased rate with no change in energy per electron.

D. at a reduced rate with no change in energy per electron.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

19#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A beam of X-rays of frequo,zcdc2c9 -rz ency f is incident upon a substance that scatters the beam in various directions.cc crz 2,z-od9 If we measure the frequency of the scattered X-rays, we will find

A. X-rays with frequency less than f.

B. X-rays with frequency greater than f.

C. only X-rays with frequency f.

D. X-rays with frequencies ranging from less than f to greater than f.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

20#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A beam of X-rays of wavelength l is incident upon a su idp4i*rz)1 arbstance that scatters the beam in various directions. If we measure the wavelength of the scattrda4p1)z ri* iered X-rays, we will find

A. X-rays with wavelength less than l.

B. X-rays with wavelength greater than l.

C. only X-rays with wavelength l.

D. X-rays which range in wavelength from less than l to greater than l.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

21#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When a photon is scattered from an electron, there will be an in 2ld, )zhhk08yp dupi+ hg1o3vcrease in its

A. energy.

B. frequency.

C. wavelength.

D. momentum.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

22#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In the Compton effect, as the scattering angle increases, the frequency of the Xi6 7c rp-vf3 s2l6o -*efhxstf-rays scattered at th6efp3f-7-o6si xv fhctr2 s* lat angle

A. increases.

B. decreases.

C. does not change.

D. varies randomly.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

23#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In a Compton scattering experiment, what scattering angle produces the gt kbcoj/z;;m*6 djzs)reatest change in )tmjj; ;* /6okcsdzbz wavelength?

A. $0^{\circ}$

B. $90^{\circ}$

C. $180^{\circ}$

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:

Correct Answer:

Join the discussion for this question

Mark Problem

24#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When the accelerating voltage in an X-rz f ,,7jvq(xkjxq02zt ay tube is doubled, the minimum wavelength of the X,0( fqtx z2j,xjq7v kz-rays

A. is increased to twice the original value.

B. is increased to four times the original value.

C. is decreased to one-half the original value.

D. is decreased to one-fourth the original value.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

25#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When a proton passes through matter, it is -+ei jbflzjhp3 *lc n) 5;.(uacimat7possible for it to interact with the matter in such a way that an electron and a positron are produced; this interaction ie l)5mj7; n3j.u b*+(ia-cphifatl zcs referred to as

A. the photoelectric effect.

B. the Compton effect.

C. pair production.

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:

Correct Answer:

Join the discussion for this question

Mark Problem

26#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

As a particle travels4lm-egr res )- faster, its de Broglie wavelength

A. increases.

B. decreases.

C. remains constant.

D. could be any of the given answers; it depends on other factors.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

27#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When an electron is accelerated to a higher speed, there is a decgkku2r-wx: (m rease in its

A. energy.

B. frequency.

C. wavelength.

D. momentum.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

28#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which one of the followingzvlsi v9 l2)hyg wal(1:7h *xs would tend to have the smallest wavelength if they are moiw )lvl1yg:(vsz h9ahx2 l s7*ving with the same speed?

A. electron

B. proton

C. baseball

D. bowling ball

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

29#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The reason the wavelike nature of a moving baseball is not noticed in e4d bvdj4q rmd7r7k u(ixy um/fm3r/+0veryday life is thatb 73mm4+7d(mrjvxu4ik/0 / qufrd ryd

A. it doesn't have a wavelike nature.

B. its wavelength is too small.

C. its frequency is too small.

D. its energy is too small.

E. No one pays attention to such things except for the Mets; and they can't hit a curve ball anyway.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

30#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What advantage might an electron microscope have over a li6ldz *0o8cdq9pght4 jxnkqw1t ;.t ) wght microscope?

A. Electrons are more powerful.

B. Shorter wavelengths are possible.

C. Longer wavelengths are possible.

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:

Correct Answer:

Join the discussion for this question

Mark Problem

31#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The part of an electron microscope that plays the same role as the lenses gz)eh d ;o 6ha+kb/98k txhta/do in an opticak)hhda/9/th+zt6x 8oe bkag;l microscope is

A. the vacuum chamber.

B. the coils.

C. the cathode.

D. the deflector plates.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

32#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which of the following microscopes is capable of xi;yl)-k*q.z: ehw) z i.sf j 5qjzxo3"photographing" individual atomjki:z5)qfs.qx .x;e- z jhowlzi 3) y*s?

A. light microscope

B. scanning tunneling microscope

C. transmission electron microscope

D. scanning electron microscope

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

33#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

According to the Bohr model of the atom, the angul hj c:)cu)kfn 5kh+x1h vu(:hst, :ujtar momentum of an electron around thejt5cuv j:1n h)hfh :us ck+h uk:t)(,x nucleus

A. could equal any positive value.

B. must equal an integral multiple of h.

C. must equal an integral multiple of h/2p.

D. decreases with time, eventually becoming zero.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

34#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When an electron jumps from an orbit where n = 4 to one where n sg(q10brnj b8f0:jnn = 2

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

35#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The distance between adjacent orbit rad+m lbzqn,z1b j3fw *p3ii in a hydrogen atom

A. increases with increasing values of n.

B. decreases with increasing values of n.

C. remains constant for all values of n.

D. varies randomly with increasing values of n.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

36#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The energy differencetj/ q (bt04 w.zkudf0j between adjacent orbit radii in a hydrogen atom

A. increases with increasing values of n.

B. decreases with increasing values of n.

C. remains constant for all values of n.

D. varies randomly with increasing values of n.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

37#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the wavelength corresponding to thek)eaz .o* x;jsvsi4g. m;) gix most intense light emitted by a giant stasm.)4a kxvso igej* g;xzi; .)r of surface temperature 5000 K?

A. $576 \; nm$

B. $578 \; nm$

C. $580 \; nm$

D. $582 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

38#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the frequency of the most intense radiation from an object with tywc*z ra yq(4zzg)* .+t b(kstemperatuzqb+y g.(trz*)y4 (katc *sz wre $100 ^{\circ}C$?

A. $2.9 \times 10^{-5} \; Hz$

B. $3.9 \times 10^{13} \; Hz$

C. $1.0 \times 10^{13} \; Hz$

D. $1.0 \times 10^{11} \; Hz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

39#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much energy is carried by a phoslh400h3ysk r n wbp5-ton with frequency 110 GHz?

A. $1.1 \times 10^{-20} \; J$

B. $1.4 \times 10^{-22} \; J$

C. $7.3 \times 10^{-23} \; J$

D. $1.3 \times 10^{-25} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

40#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much energy is carried by a photon with a,j- feara mv)- frequency of 100,000 GHz?

A. $4.73 \times 10^{-42} \; J$

B. $4.37 \times 10^{-24} \; J$

C. $6.63 \times 10^{-24} \; J$

D. $6.63 \times 10^{-20} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

41#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What frequency of electromagnetic radiation has ehhiz (+k0 yu(rnergy $4.7 \times 10^{-25} \; J$?

A. $710 \; kHz$

B. $4.7 \; MHz$

C. $710 \; MHz$

D. $1.4 \; GHz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

42#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What frequency of electromagnetic radiation has an energy of jm): b5 iujow6-(cvc+es *;zmn xy*hma;j w0p 58.1 meV?

A. $1.4 \; MHz$

B. $711 \; MHz$

C. $7.1 \; GHz$

D. $14 \; GHz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

43#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the photon ephpx4o,3o 0lw f *1qfonergy of red light having wavelength 640 nm?

A. $1.13 \times 10^{-19} \; J$

B. $1.31 \times 10^{-19} \; J$

C. $3.11 \times 10^{-19} \; J$

D. $1.94 \times 10^{-19} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

44#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much energy, in joules, ixixdh9c n: v+ykxm.yp1;ii;0 s carried by a photon of wavelength 660 nm?

A. $1.46 \times 10^{-48} \; J$

B. $3.01 \times 10^{-19} \; J$

C. $6.63 \times 10^{-34} \; J$

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:

Correct Answer:

Join the discussion for this question

Mark Problem

45#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

At what rate are photons emitted by a 50-W sodium vapor lamp? 7 rl 3mg;m tk6uiochvd+1*weu-s:,u y (Assume that the lamp's light is monochromatic ankmc, d lu;r7*6oh3mwg+iv -u1uetys:d of wavelength $589 \; nm$.)

A. $1.0 \times 10^{20}/$s

B. $1.5 \times 10^{20}/$s

C. $2.0 \times 10^{20}/$s

D. $2.5 \times 10^{20}/$s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

46#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A metal has a work function of 4.5 eV. Find thso7x20 4*e+,prelbjlxnc4 ev e maximum kinetic energy of the photoelectrons if the wavelength of light i2e+c04lse, bxjlnr *7vex 4 ops 250 nm.

A. zero

B. $0.37 \; eV$

C. $0.46 \; eV$

D. $0.53 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

47#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When light of wavelength 350 nm is incident on a meta-x4e q lk4s+kml surface, the stopping potentkse+qxkl4 m-4ial of the photoelectrons is 0.500 eV. What is the work function of the metal?

A. $0.500 \; eV$

B. $3.04 \; eV$

C. $3.54 \; eV$

D. $4.12 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

48#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When light of wavelength 350 nm is incident on a metal s x36ji ll *v6v8rvkexceu1+w7urface, the stopping potential of the photoelectrons is 0.500 ex6lv*ue ic61vwv k3xj+lre 78 V. What is the threshold frequency?

A. $3.47 \times 10^{14} \; Hz$

B. $3.74 \times 10^{14} \; Hz$

C. $4.73 \times 10^{14} \; Hz$

D. $7.34 \times 10^{14} \; Hz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

49#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When light of wavelength 350 nm is incident on a c zgej:p)tiv 10ncpey.8/*: y(af twnmetal surface, the stopping potential of the photoelectrons is 0.500 eV. Whatn jvn 8eyy0gw :pat/izc.()1: f*tpec is the maximum kinetic energy of the electron?

A. $0.500 \; eV$

B. $3.04 \; eV$

C. $3.54 \; eV$

D. $4.12 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

50#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A monochromatic light is incident wi*k yr4 1 sj,/+2elmyj8ecrnon the surface of a metal with work function 2.50 eV. If a 1.0-V stopping potential is required to make the photocurrent zero, what is the wavelength rjr8*2eyiyn+1 /wks,4 je cl mof light?

A. $354 \; nm$

B. $423 \; nm$

C. $497 \; nm$

D. $744 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

51#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If the scattering angle in Compton7 qss/s hcx y:wo8i,kz.ymx2;'s scattering is 90e. What is the wavelength shi;x xycy,7is8 wshm o/.k:2sq zft?

A. $1.22 \times 10^{-12} \; m$

B. $2.43 \times 10^{-12} \; m$

C. $3.65 \times 10^{-12} \; m$

D. $4.85 \times 10^{-12} \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

52#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

X-rays of wavelength 0.20 nm are scattered by a metal. The wavelength s0ntfpmo0 ucr/h 85)y shift is observed to be8/f)rncmth0 o y5ups0
$2.1 \times 10^{-12} \; m$ at a certain scattering angle measured relative to the incoming X-ray. What is the scattering angle?

A. $20^{\circ}$

B. $40^{\circ}$

C. $60^{\circ}$

D. $80^{\circ}$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

53#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

X-rays with a wavelength of 9mkwtm t 2r,,oq ry9yd*i4ck2 7ct.q ce-,qgk0.00100 nm are scattered by free electrons at 130e. What is2 k4kq y-qcgtcrdm ,rty *w.,omk7i2cq 9e 9,t the kinetic energy of each recoil electron?

A. $2.5 \; MeV$

B. $5.0 \; MeV$

C. $7.5 \; MeV$

D. $10 \; MeV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

54#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the wavelength of the matter wave associated with a ball of mass 26yf gtk zvzvo.4 *t)i0.50 kg moving witf2yz gizo.tk4 6v)v* th a speed of 25 m/s?

A. $3.5 \times 10^{-35} \; m$

B. $5.3 \times 10^{-35} \; m$

C. $3.5 \times 10^{-33} \; m$

D. $5.3 \times 10^{-33} \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

55#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the de Broglie wavelength of a ball of mass 200 g moving with a speer( z m,(42wty uckk3dupdz*u :d of 30 m 3w 42:(*,rmcu zu(dykpkudtz /s?

A. $1.1 \times 10^{-34} \; m$

B. $2.2 \times 10^{-34} \; m$

C. $4.5 \times 10^{-28} \; m$

D. $6.7 \times 10^{-27} \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

56#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the wavelength of the matter wave associated wit6zwej mqt 7ucj-b* )l*h an electron moving with a speed of 7*)6zjbm c*teqwl -uj$2.5 \times 10^7 \; m/s$?

A. $29 \; pm$

B. $35 \; pm$

C. $47 \; pm$

D. $53 \; pm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

57#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated through a potential difference of 150 V. What is z,:xwy/cy5 uuits wavex,w ucyy 5uz:/length?

A. $0.1 \; nm$

B. $1 \; nm$

C. $1 \; mm$

D. $1 \; cm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

58#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated by a potential differ o7f9 tgy.b4+ sihkft/ence of 100 V. What is its wavelength? ih + otft9.gb4/sk7fy

A. $0.122 \; nm$

B. $0.212 \; nm$

C. $0.221 \; nm$

D. $0.313 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

59#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated byxk1o xqm s*o u*080mhw a potential difference of 100 V. What is its momentwx k*0*oso0qm8 1hx umum in $kg \cdot m/s$?

A. $3.45 \times 10^{-24}$

B. $3.54 \times 10^{-24}$

C. $4.53 \times 10^{-24}$

D. $5.43 \times 10^{-24}$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

60#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated by a potential differelz-/j5rhal (h pg ;z)znce of 100 V. What is its kinetic energya(;zrpjh-zz)l h g/l5?

A. $1.26 \times 10^{-17} \; J$

B. $1.62 \times 10^{-17} \; J$

C. $2.16 \times 10^{-17} \; J$

D. $2.61 \times 10^{-17} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

61#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A person of mass 50 kg has a wavelekq25m+ekydjki0) ezvf*- ( etngth of $4.4 \times 10^{-36} \; m$ when running. How fast is she running?

A. 2.0 m/s

B. 3.0 m/s

C. 4.0 m/s

D. 5.0 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

62#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron has a wavelength of 0.123 nm. What imldxgq2(,5o 7ifha .zs its energy in eV? (This energy is not in the rela57o gda2mhx q .if(,zltivistic region.)

A. $20 \; eV$

B. $60 \; eV$

C. $80 \; eV$

D. $100 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

63#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If $r_1$ is the smallest orbital radius around a single proton, then $r_6$ is equal to

A. $36 r_1$.

B. $12 r_1$.

C. $6 r_1$.

D. $2.45 r_1$.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

64#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The electron of a hydroge/3hc u 8(4 wrwal/ppqk7q (ni*gu, torr5e*vjn atom makes a transition from the n = 5 state to the n = 2/irtn3ge7u8 ,jloaw* w r/q((q vu*5 4kphrcp state. What is the wavelength of the emitted photon?

A. $344 \; nm$

B. $434 \; nm$

C. $443 \; nm$

D. $523 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

65#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The binding energy of the hydrogen atom in its ground state is -13.6 eV. gjhj f69szx,x.tvu s/o ly.ze3;o+( jWhat is the energy when it is in txel+ j.sv9xgju6 o ;z.(h3j/f os,yzthe n = 5 state?

A. $2.72 \; eV$

B. $-2.72 \; eV$

C. $0.544 \; eV$

D. $-0.544 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

66#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A hydrogen atom in the ground state absorbs a photon of energy 12.09 eV. To wh: 7m+pyr) pxufich state will the electrouy 7 m+pfpr:x)n make a transition?

A. n = 2

B. n = 3

C. n = 4

D. n = 5

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

67#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the ionization energy of the neutral p4f(x,;b6/q h nidxcu hydrogen atom?

A. $27.2 \; eV$

B. $13.6 \; eV$

C. $6.8 \; eV$

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:

Correct Answer:

Join the discussion for this question

Mark Problem

68#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the ionization enert)ttt871d0 fm4 pyg arz e46i( u:ep-ngkoxj*gy of singly ionized helium?

A. $54.4 \; eV$

B. $27.2 \; eV$

C. $13.6 \; eV$

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:

Correct Answer:

Join the discussion for this question

Mark Problem

69#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In making a transition from state n = 1 to state n = 20jxwr *9/jk hvir7 5vq, the hydrogen atom must

A. absorb a photon of energy 10.2 eV.

B. emit a photon of energy 10.2 eV.

C. absorb a photon of energy 13.58 eV.

D. emit a photon of energy 13.58 eV.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

70#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In state n = 1, the energy of the hydrogen atom is -13.58 eV.it5*/i1h*)gkhk9ul9n s fb jj What is its energy in si9i tj nf/g*s uhl5h1)k*9 kjbtate n = 2?

A. -6.79 eV

B. -4.53 eV

C. -3.40 eV

D. -1.51 eV

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，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

Mark Problem

71#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The wavelength of a ruby laser is 694.3 nm. What is y gt1 lvc9r)x:q6 mk57mxrwv:the energy difference between the two energy states involved in qvg:r 5 x7w6tyc1m9r vk:) lmxlaser action?

A. $1.537 \; eV$

B. $1.646 \; eV$

C. $1.786 \; eV$

D. $1.812 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

72#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is moving about a singlepw;b r 4ne ;swyo)k7 5he2zlb+ proton in an orbit characterized by n = 4. How many of the electron's de Broglie wavelengths fit into the circumference of theh4n rbw5spkwbz +7;e 2 oyl;)is orbit?

A. 1

B. 2

C. 4

D. 16

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

		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	39	40
41	42	43	44	45	46	47	48	49	50
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72

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
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72

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
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72