Momentum and Energy - 题库网 (tiku.one)

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1#

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04.22: One implication of Einsteig-(yn oqu)e8c. lv5:uj-dpztj 1c(ofn'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 have perfected a technique in which (ex7fk:nu,kml lu, grzqm/- 7 he can spontaneously convert an electron completely into energy in the laboratory without any other material requirekem 7fl/ x rn,uk7z(:, qumg-ld. 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 where c is thm v(gxba:mqu :nc0odk3)t),rx9wwv d5;q k4 he speed of light. Electron #2 moves with speed 0.60 c. What is the ratio of the kinetic energy of electron #2 t mn) xg:av,kv kr u4wc) ;mt0b3xw5d9oq(:qdho 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 ofwx5gabiw 5gt9/nmsmctz 09(5 kg.m/s) of an electron moving s/m5tw50tm a9xnw( z9 iggb5cin 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 e)in2m) syyg:magnitude of their linear momentum having a ratio of 2:1. If the sl) sgyiyme):2nower 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 associatedn 8j 4p/ rooj5,utlzn( with an electron is twice its rest energy. At what speed is the elep4rjj8tnzln o u 5(o,/ctron 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 lin 6kn7ltbyvll citmc:s;.90)near 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 objens;l/.p *rjz z;kt6m wosyx9b*cx x35ct is accelerated to a speez5 pmsk *oxz9c*j ;xl;sry3bt w6x./nd 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; uku:n ug)v;0b 8kjrvy;icx; 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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