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 jcdt 1-o-xui, 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 havexw 1 dj7c.3kmb perfected a technique in which he can spontaneously convert an electron completely into energy in the laboratory without any ox1b j7c d3wk.mther 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 moves with speed 08vypk 7z/87 jjf0ywja .30 c where c is the speed of light. Electron #2 moves with speed 0.60 c. What iyf7j/88kw 7 j avjpyz0s the ratio of the kinetic energy of 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 linear momentum (in units of kg.m/s) of an eu teqz; 31ipm1d;.i felectron moving in m.pqi;e1fitz1;d3u ea 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 mf-7o7up l4dmij6umn-l .o j7love with the magnitude of their linear momentum having a ratio of 2:1. If the slower electron moves with a speej n j.lio77md7-fpum l l-6ou4d 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 ;vpn :t:bb ufd ( g)umt)3qxt+twice its rest energy. At what speed is the electron travbb3mp)u;tn(f: vgqt)u:xtd +eling(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 momedz 3y3b3w e1et7u n*cfntum 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 tha9nq0gq8k 3 7rz8 )w pvkt5rixis object is accelerated to a speed of 9nxt kzw8g70v r)3iapkqrq85 $2.4\times\:10^8\:m/s$ , 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 thgy rsk86uy:z7nxd,u; e 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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