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 Einstein's theo9qjr ,bn5w:kc f*k8u dries 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 have perfected a technique in which he can spontatk1 vy+ft qj8+neously convert an electron completely into energy in the laboratory without any other material required. What is the conclusion about this claim from our cur+tjt1y8q v+f krent 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 0.30 c where c+bcz dhz4 69 .jghv.mh is the speed of light. Electron #2 moves with speed 0.60 c. What is the ratio of the kinetic energy of el+. zg4v9mhdh hzb6.jcectron #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 magnitude of the linear momentum (in unitsh v,c4rnvsd apm: 4-w* of kg.m/s) of an electrona,wphnc44 v*dsm :-rv moving 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 of their linear momentum h)k 8h .c0p r.xe9tumsyaving a ratio of 2:1. If thyx)9t8kus h p.cm.re0e 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 with an electron is twice its rw t q6.qw+h,:bps2z mrest energy. At what speed is the electron traveling(in uni6tbhp2w.rq:z,+sw m qt 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 energy of 500 lx*3 ouke. v85zx9 uywMeV 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 igp csl1x nwz *r4h7k8d-6mhq0s initially at rest. After this object is accelerated4w kdgz lcr60-h qh1m* np8xs7 to 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 0d(qmm cd 53mt al*u7itravel to the right. 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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