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 implicatio6v ab3qvgh4o: .(x;z qy r-iljn of Einstein'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 a2dkmbc -) +ubk technique in which he can spontaneously convert an electron completely into energy in the laboratory without +)kdb2b mk-ucany 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 moves with speed 0.30 c where c i5o/ dh/b:afzls the speed of light. Electron #2 moves with speed 0.60 c. What is the ratio of the kinetic energy of electron #2 to electr bf5lho:da z//on #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 aa-(kt+ne 5fu1/5w vwh aw:j-sbdz( nen electron moving in a (wfhtkbns (/ ja5nave+zd5 : u-- ww1estraight 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 wo30 -:vftfi oof1/bip cv+ug:ith the magnitude of their linear momentum having a ratio of obv3o0p:of+ / ci-gv if1utf:2:1. If the 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 energy.g9 q 238mf/ney- wqtuc At what speed is the electron traveling(in unit ofgn q2yt/3fuwm8ceq- 9 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 linezxjz3grig0kim ie*o 1: +5m,yar 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. Aslh.u:x +f1x,(ybf y as y/sx(fter this object is accelerated to a speed ofxf:asly. (+sy/,(usf x1b yxh $2.4\times\:10^8\:m/s$ , 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 part73q ibr p+u00qwsvty4fah):t icle 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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