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?作业考试练习?美国物理杯赛(Physics Bowl)?Wave Basic Concepts

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习题练习：Wave Basic Concepts

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作者: admin 发布日期: 2024-07-31 18:43 总分: 19分得分: _____________

答题人: 游客未登录开始时间: 24年07月31日 18:43 切换到: 整卷模式

1#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

94.06: Which of the following statemen5okrc)f7p( *ej: lkqond( 8bz ts about the speed of waves on a string are trnc8 j: krz5 ld)eo(bf7qo (k*pue?
I. The speed depends on the tension in the string.
II. The speed depends on the frequency.
III. The speed depends on the mass per unit length of the string.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.23: String L and string H have the same tension otv(v.k ( o;mi-nr9n9cm6vwhy:r)vjc b.wm6 and length. String L has mass m and string H has mass 4m. If the speed waves in string L is v, the speed of waves in stringmcw.v bn(r; (v h6o)v9o v.r:cyk9mim6- tnj w H is

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.44: A person vibrates the end of a string sending transverse wavesucw,ld 9+ ho)d/ m*3ywr xj- jfp1l2sm down the string. If odr*xmhwj+ w/3-dpm1u fc2s ll jy 9,)the person then doubles the rate at which he vibrates the string, the speed of the waves

A. doubles and the wavelength is unchanged

B. doubles and the wavelength doubled

C. doubles while the wavelength is halved

D. is unchanged while the wavelength is doubled

E. is unchanged while the wavelength is halved.

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

11.23: A string, clamped at both ends, has its tension fixed. A wave gener wz9pf,+bmvi,ator vibrates the bfwzp v+ ,9,mistring with a frequency $f$ producing waves of wavelength $\lambda$ which have speed v. The frequency of the wave generator now is doubled to $2f$. Which one of the following choices best describes the new values of the wavelength of waves produced and the speed of the waves on the string？

A. Wavelength is $0.5\lambda$,Wave Speed is v

B. Wavelength is $0.5\lambda$,Wave Speed is 2v

C. Wavelength is $\lambda$,Wave Speed is 2v

D. Wavelength is $\lambda$,Wave Speed is v

E. Wavelength is $2\lambda$,Wave Speed is 4v

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.01： Which is not associated ) b-(cke j:4sugjknm-with a sound wave?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.04： A wave has a frequency ofqx e32si)w+8 cpl vis6 50 Hz. The period of the wave is:

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.04： A metal bar is vibrating with a freque oi(xw0lymg3mpc 2r:m )(-v:obezo 2qncy of 200 Hz. The period of oscillation woul qvp2yo(me cb lm:2m3 ) rio-xg0:wzo(d be:

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.38: The S-waves (transverse) and P-waves (longitu.k ewns+r40 8f/epdq o28zufudinal) produced by earthquakes travel at different speeds through the earth. S-waves travel about 4000 m/s, P-waves travel at nearly 7000 m/s, how far away must an earthquake be for the P-waves to arrive 2 minutes before thef u.d0+n8uzw qop2e4sr 8fk/e S-waves?

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.07: A traveling sine wave of frequecyz93z pxuup:7 ,dhsk.0*e doncy 3.0 Hz is known to move at 6.0 m/s on a stri:d u phc3 x*zpoudks7. ,y90ezng. Which one of the following figures best represents what a one-meter section of the string could look like at an instant of time?

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.24: Which one of the following statements best describes Huygens’s Princiti5pe;o sy /w+ple?p 5 y;+ieso/tw

A. An additional pressure is transmitted undiminished to all points in the fluid and to the walls of the container.

B. Each point on a wavefront acts as a source of secondary spherical wavelets (new waves).

C. For every action force, there is an equal but opposite reaction force.

D. It is impossible to have a process which has the sole result of transferring energy from a low temperature reservoir to a high temperature reservoir.

E. A time-changing magnetic field has an associated induced electric field.

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.07: The diagram shows two water pulses which were originally prod+vnc1kh 0 qjw+*+ ceemn3:emkuced at point A and are beginning to bem m qkn+ee3+ 0:1*nj+kcec vhw reflected from a wide barrier as shown. Which of the points in the diagram would represent a virtual source for the reflected waves?

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.03: If the frequency of sound is doubled, the wavelen u,5rrrm 0vhbyd07 th1gth:

A. halves and the speed remains unchanged.

B. doubles and the speed remains unchanged.

C. is unchanged and the speed doubles.

D. is unchanged and the speed halves.

E. the wavelength halves and the speed halves.

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.27: Assume that waves are o ftr l7c gap7yq:-q6)propagating in a uniform medium. If the frequency of thea 7glo6rc :y-ftq7)pq wave source
doubles then

A. the speed of the waves doubles

B. the wavelength of the waves doubles

C. the speed of the waves halves

D. the wavelength of the waves halves

E. none of the above

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.02: An observer hears a sound with frequen6ck(kv/um-jbzyst9* cy 400 Hz. Its wavelength is approximay vz6skubj9-m*/ ck(ttely

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The graph below was produce +euz )7 64-v8tdsb0axvhqflh by a microphone in front of a tuning fork. It shows the voltage produced from ze)qh f4d-ub6a 078vthxsl+v the microphone as a function of time.

04.18: The frequency of the tuning fork is (approximately)

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The graph below was produce by a micro pwb*- ztrqb:m.p5nc/phone in front of a tuning fork. It shows the voltagetbqp.bpwz *cn /rm-:5
produced from the microphone as a function of time.

04.19: In order to calculate the speed of sound from the graph, you would also need to know

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.28: A radio signal with a wavelength ocn/r*0:t y lqnf $1.2 × 10^{−4}\:m$ is sent to a distance asteroid, is reflected, and returns to Earth 72 hours and 48 minutes later. How far from Earth is the asteroid?

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18#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.46: A traveling wave has the form y = 3.0sin(2.5 x − 5.0 t) where all quanticdedsu()es1 1x3 h3 sjti1( s x1)3 scde3dseujhes given are in MKS units, x is position, and t represents time. What is the period of the wave (in seconds)?

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19#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

11.17: A new radio station broadcasts its signal with a wavelength of 3.erv,-ne0ps * l2 wt0y+7sudxs40 m. At what frs *el2prtdwe+sxsv u 7,y-00 nequency is this station broadcasting?

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总分:19分及格:11.4分时间:不限时

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