Momentum and Energy - 题库网 (tiku.one)

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1#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.22: One implication of E2co hh8bv:w8u gw9 vt0instein's theories is that

A. all energy has mass properties.

B. moving particles apparently lose mass.

C. momentum is not conserved in very high-speed collisions.

D. a meter stick moving rapidly perpendicular to its length appears shortened in length.

E. every process is relative.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.35: A scientist claims to hav)5ex0 )b3oxd tpf 9bwwe perfected a technique in which he can spontaneously convert an electron completely into energy in the laboratory without any other material requ w)bt0 o)w3x9 bxdepf5ired. What is the conclusion about this claim from our current understanding of physics?

A. This is possible because Einstein’s equation says that mass and energy are equivalent… it is just very difficult to achieve with electrons

B. This is possible and it is done all the time in the high-energy physics labs.

C. The scientist is almost correct… except that in converting the electron to energy, an electron’s anti-particle is produced in the process as well.

D. The scientist is almost correct… except that in converting the electron to energy, a proton is produced in the process as well.

E. This is not possible because charge conservation would be violated.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.45: Electron #1 moves with speed 0. ueq:e fu u;g7m/ +1edohu7pq/30 c where c is the speed of light. Electron #2 moves with speed 0.60 c. What is the ratio of the kinetic energy of electron m7puqufdu ;1+o// qhe:gu e7e #2 to electron #1?

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.50: What is the magnij6h,mp bgj63ptude of the linear momentum (in units of kg.m/s) of an electron movinggpj6h6jpm b3, in a straight line if it has $3.2\times\:10^{−13}J$ of kinetic energy?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.49: Two electrons move with the magnitude iq u 2jg.ap5:wof their linear momentum having a ratio of 2:1. p.u5aq:jigw2 If the slower electron moves with a speed of $1. 20\times\:10^8\:m/s$, what is the speed of the faster moving electron (in unit of m/s)?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

15.49: The kinetic energy associated witacf*mp4nbg p 2wc6 8(ih an electron is twice its rest energy. At what spgwa6i*2bnpc mf4c8( p eed is the electron traveling(in unit of m/s)?

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

18.49: A particle has a total energy7hk,u49b6il ruir / pz1;ix ad of 500 MeV and a linear momentum of 300 $\frac{MeV}{c}$. What is the mass of the particle?

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.50: An object of mass m is9trgjhlj*+ )2r w zn(b07sxug initially at rest. After this object is accelerated tznl0 w)u(jgxr+9g7*rj2 h sbto a speed of $2.4\times\:10^8\:m/s$ , it collides with and sticks to a second object of mass m at rest. Immediately after
the collision, what is the common speed of the two masses (in unit of m/s)?

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.49: Two identical particles travel to the right.g1nrk 0k --mu voje-a. The particle traveling at $2.4\times\:10^8\:m/s$ collides with and sticks to the other particle traveling at $1.8\times\:10^8\:m/s$. Which one of the following choices best represents the speed of the resulting object after collision(in unit of m/s)?

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