Momentum and Energy - 无忧得胜-网上国际课程 (5edu.win)

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1#

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04.22: One implication of Einstein's theories is tgbr v2gqdr8jy /8/+2tw /seykhat

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#

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06.35: A scientist claims to have perfe8pjv g+kc -:dqcted a technique in which he can spontaneously convert an electron completely into energy in the laboratory without any other mapd:k j-g q8cv+terial 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 moves with speed 0.30 c whereb3y 3d cv+re5q c is the speed of light. Electron #2 moves with speed 0.60 c. What is the ratio of the kinetic energy of+ vqr53cbdy3 e electron #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 c d1 )rbha9a,zc/hur9sh sv67linear momentum (in units of kg.m/s) of an electron moving in a straight l1hvch ua)/r, dssz69 ahbr97 cine 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 magnpt3* vri-6u f v+gq(wzitude of their linear momentum having a ratio of 2:1. If the slower electron movgpu36 vqfzw*t i(r+v-es 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 associate 8r*3;rjl;gnetxc-p3wd 5b f vd with an electron is twice its rest energy. At what speed is the electron travel533ew gcbprvfr * djn8t;;x-ling(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 tol77 g x*zavg* f++gs i(a3ivgw) 0bvwstal energy 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 is initially at rest. After this objeeq .ijo.8 ul5i6qs8gect is accelerated to a speed o s5.8ieoq q g6iuel.j8f $2.4\times\:10^8\:m/s$ , 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. The particle3 ray+o:(j esr 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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本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
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