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'(;oet7x yrgo4s 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 have perfected a technique in which he can spont+ -/6pcheroh)vawb 8n aneously convert an electron completely into energy in the laboratory withouvb8p cehr h )/+6-nawot any other material required. 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 m2rslg cq4fi r0 -2;yzooves with speed 0.30 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 #2 -iy f;r4s20cg l2qorz 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 (ift85/ ;*rt0pq i8zdttm0p zosn units of kg.m/s) of an electron moving it0ms05 q/;opt *8zr iz tdftp8n 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 magni6gpdpeg.yy83ppn/9rvs-q )i8bd3ut c ;x-z l tude of their linear momentum having a ratio of 2:1. If the 39szdiq gpcp3;8g/t x-n)6rpy.-lpy du8veb 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 rest enerkjp qa-a7ffgm7 tti8yp* d rn vin,p6r79z14(gy. At what speed is the electrovt p18t r -qff7azdyapniim7 pj7 ,r64(n*k9g n 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 energy of 500 MeV and a linear momena;2bh:f hr j/qtum 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 is initially at rest. After thi/j9z 8a1aoa ylm81clbs object is acceleratedlyl9c1a oza8b/j 18 ma 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 travel t x/8ie3rw63.betj zwi;nq v2ro 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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