Physics Unit26: Special Theory of Relativity - https://webassign.org

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PRACTICE：Physics Unit26: Special Theory of Relativity

本Practice来源于https://webassign.org，是在线Practice的打印版，您也可以访问本平台网站(https://webassign.org/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 325 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://webassign.org/test325.html
Author: physics Total Marks: 61 mks Marks Awarded: _____________

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1#

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You are riding in a spaceship that 5xuhqm+6(lalx a8 4mb has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocityxm+q6m (l alb hua548x. What should you do?

A. You can determine if the ship is moving by determining the apparent velocity of light.

B. You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving.

C. You can determine if the ship is moving either by determining the apparent velocity of light or by checking your precision time piece. If it's running slow, the ship is moving.

D. You should give up because you have taken on an impossible task.

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2#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The Michelson-Morley experiment was designed to h;d iy3 .4/+oyeiv:aq(7 falhx g lvq,measure

A. the relativistic mass of the electron.

B. the relativistic energy of the electron.

C. the velocity of the Earth relative to the ether.

D. the acceleration of gravity on the Earth's surface.

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3#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Michelson and Morley concluded from the results of thkl*gs;p c h)(qeir experiment that

A. the experiment was a failure since there was no detectable shift in the interference pattern.

B. the experiment was successful in not detecting a shift in the interference pattern.

C. the experiment was a failure since they detected a shift in the interference pattern.

D. the experiment was successful in detecting a shift in the interference pattern.

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4#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

You can build an interfero7bld ib,-r 2shmeter yourself if you use the following components:

A. a light source, a detector screen, a partially silvered mirror, a flat mirror, and a glass plate.

B. a light source, a detector screen, two partially silvered mirrors, and a glass plate.

C. a light source, a detector screen, two partially silvered mirrors, a flat mirror, and a glass plate.

D. a light source, a detector screen, a partially silvered mirror, two flat mirrors, and a glass plate.

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5#

Free-Response ( 1.0 marks) Whole-Paper View Save Problem

State the relativity pp6z:p l*jd, jrrinciple.

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6#

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State the three unprovable assumptions of mlfsfe6o; 1c 74yro*w1z.yc x Galilean-Newtonian relativity.

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7#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The theory of special relati/yzd)v6 5j5a1j w6l1kuoff d qvity

A. is based on a complex mathematical analysis.

B. has not been verified by experiment.

C. does not agree with Newtonian mechanics.

D. does not agree with electromagnetic theory.

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8#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

One of Einstein's postulates in formulating the special theory of rank- d tsozt9. i:usp;gr+x01 elativity was that . sxoz ki+1pd:-t0s u9nga;r tthe laws of physics are the same in reference frames that

A. accelerate.

B. move at constant velocity with respect to an inertial frame.

C. oscillate.

D. are stationary, but not in moving frames.

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9#

Free-Response ( 1.0 marks) Whole-Paper View Save Problem

State the first postulate of special relativit3pkxbbx4y 3 i1y3kcu q:a ,cd-y.

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10#

Free-Response ( 1.0 marks) Whole-Paper View Save Problem

State the second post7t(aj5 t qzop*ulate of special relativity.

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11#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If you were to measure your pulse rate while in a space+rfhv8 espq.2 -qufb6 ship moving away from the Sun at a spee2b+6rf qp v seu8qh.-fd close to the speed of light, you would find that it was

A. much faster than normal.

B. much slower than normal.

C. the same as it was here on Earth.

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12#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Relative to a stationary obserugzr h1j7+2hktb *9 eqver, a moving clock

A. always runs slower than normal.

B. always runs faster than normal.

C. keeps its normal time.

D. can do any of the above. It depends on the relative velocity between the observer and the clock.

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13#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The gamma factor is defi2 vrd olsgd) 3jr;,nn9ned as $\gamma = 1 / \sqrt{1- (v/c)^2}$, therefore gamma ($\gamma$)

A. can be zero.

B. can be any number less than or equal to one.

C. can be any number greater than or equal to one.

D. cannot equal one.

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14#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Suppose one twin takes a ride in a space ship traveling at a very z3goo 3kt+nf f+ jt(ia6(1rvk high speed to a distant star ako(fr+g nk+3a3(6o 1zv tif tjnd back again, while the other twin remains on Earth. The twin that remained on Earth predicts that the astronaut twin is

A. younger.

B. the same age.

C. older.

D. cannot be determined from the given information

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15#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Relative to a stationary obse43l 9u spj leo zib8js/;+n2jmrver, a moving object

A. appears shorter than normal.

B. appears longer than normal.

C. keeps its same length time.

D. can do any of the above. It depends on the relative velocity between the observer and the object.

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16#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An object moves in a direction parf6iea4 5adr n,u e+rh3allel to its length with a velocity that approaches the velocity of light. The width of this object, as measured by a statio 6hi + f4r,erda3nu5aenary observer,

A. approaches infinity.

B. approaches zero.

C. increases slightly.

D. does not change.

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17#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An object moves in a direction parallel to its length withg jj5.r5st,seeey+zzy bj ;4- a velocity that approaches the velte, -4z j.j5g;5jy+rzses b yeocity of light. The length of this object, as measured by a stationary observer,

A. approaches infinity.

B. approaches zero.

C. increases slightly.

D. does not change.

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18#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

As the speed of a particle approaches the speed of light, the mass of thlnoe vqrxfzajaq/+;bj)tc:94)+3 z o :m)rxb e particxbjm)a / jtvco)rnzb3a9r z4o;x :+lqe: +qf)le

A. increases.

B. decreases.

C. remains the same.

D. approaches zero.

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19#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

As the speed of a particle apprhpr)p:cnlf :6l e hz6p,(1smcoaches the speed of light, the momentum of the partin , sz6ce phrc:6h:p)(m lf1plcle

A. increases.

B. decreases.

C. remains the same.

D. approaches zero.

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20#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A spear is thrown by you at a very high speed. As it passes, you3,ga m3nl0u34po5;p siov f bs measure its length at one-half its normal length. From thpp0 4l 5s3v;g,boiuasnm o3f3is measurement, you conclude that the moving spear's mass must be

A. one-half its rest mass.

B. twice its rest mass.

C. four times its rest mass.

D. none of the given answers

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21#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What happens to the kinetic energy of a speedy proton when 8n1g xacb d/h islmuan57/-+f*zqxd-its relativistic mass doanax5cqfl7x//m-si1u*zd -gh8+bn d ubles?

A. It doubles.

B. It more than doubles.

C. It less than doubles.

D. It must increase, but it is impossible to say by how much.

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22#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What happens to the total relativistic energy of 4los2 ho 21ckahx8+xp a speedy proton when its relativistic mass do42h2l8p 1 +caxh oosxkubles?

A. It doubles.

B. It more than doubles.

C. It less than doubles.

D. It must increase, but it is impossible to say by how much.

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23#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Consider a particle of mass . 3k5tx2p7 pp6kwe-ot2 koiq ceg*7mt $m$ and rest mass $m_0$. Which of the following is the correct expression for the kinetic energy of such a particle?

A. $\frac{1}{2} m_0 v^2$

B. $\frac{1}{2} m v^2$

C. $m c^2 - m_0 c^2$

D. $\frac{1}{2}(mc^2 - m_0 c^2)$

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24#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Consider two spaceships, each traveling at 0w)lfz sl5jg;o* 1 oc:h.50c in a straight line. Ship A is moving directly away from the Sun and ship B is approaching the Sun. The science offjol*f ;og) wl:1h5zsc icers on each ship measure the velocity of light coming from the Sun. What do they measure for this velocity?

A. Ship A measures it as less than c, and ship B measures it as greater than c.

B. Ship B measures it as less than c, and ship A measures it as greater than c.

C. On both ships it is measured to be less than c.

D. On both ships it is measured to be exactly c.

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25#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which of the following d 2wm2 i9 z-u1 .xo+ey0bcci;px gcx*mzepends on the observer's frame of reference?

A. the mass of the proton

B. the length of a meter stick

C. the half-life of a muon

D. all of the given answers

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26#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

As the velocity of your spaceship increases, you would observk5db3wd: aq l)2is. zle

A. that your precision clock runs slower than normal.

B. that the length of your spaceship has decreased.

C. that your mass has increased.

D. all of the given answers

E. none of the given answers

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27#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boat can travel 4.0 m/s in still water. With what speed, relativpcy l4t8jqdss+ -j4k:4 )a rsf-acf9qe to the shore, does it move in a river that is flowing at 1.0 m/s if the boat is heading upstr4say): a-l jqq9jc-st+4 krd c8pf4sf eam?

A. 3.0 m/s

B. 4.1 m/s

C. 4.8 m/s

D. 5.0 m/s

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28#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boat can travel 4.0 m/s in still 8v*pugp a nav-wdq0v1so9b( 9water. With what speed, relative to the shore, pqw(a-s0 9 vnp ag1ov* bu89dvdoes it move in a river that is flowing at 1.0 m/s if the boat is heading downstream?

A. 3.0 m/s

B. 4.1 m/s

C. 4.8 m/s

D. 5.0 m/s

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29#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boat can travel 4.0 m/s in stimwy)w6 w p19iall water. With what speed, relative to the shore, does it move in a river that is flo69y)w w1w pimawing at 1.0 m/s if the boat is heading straight across the river?

A. 3.0 m/s

B. 4.1 m/s

C. 4.8 m/s

D. 5.0 m/s

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30#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How fast should a moving clock travel z+,ijsr9tm6c5ipw u ) if it is to be observed by a stationary obsu,9 tp+wzr6mc ij)5si erver as running at one-half its normal rate?

A. $0.50 \; c$

B. $0.65 \; c$

C. $0.78 \; c$

D. $0.87 \; c$

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31#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A spaceship takes a nonstop journey to a planet and returns /:9oh to- nto h(.bl6iuy9 b9aduqu2g in 10 hours according to a clock on the spaceship. If the speed of the spaceship is 0.80c, how much time has elapsed on 96al9b2b.oto( uh 9-t:q nuogdi/ uy hthe Earth?

A. $3.2 \; h$

B. $7.0 \; h$

C. $15 \; h$

D. $17 \; h$

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32#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A set of twins, Andrea and Courtney, are initialt ao at08qb/5yh8hu9 c txi7z)p ,qp3jly 10 years old. While Courtney remains on Earth, Andrea rides on a space ship which travels away from Earth at a speed of 0.6c for five years (as measured by Courtney), then turns around and comes back at 0.6c. When A83a c8paqty h q7/b,h o5t)z xp0jut9indrea returns, Courtney is 20 years old. How old is Andrea upon her return?

A. $10 \; years$

B. $12 \; years$

C. $18 \; years$

D. $20 \; years$

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33#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

One 20-year-old twin brother takesug)c8 a3gwm+p a space trip with a speed of 0.80c for 30 years according to a clock on the spaceship)u ap g+g83cwm. Upon returning to the Earth, what is his own age and the age of the Earth-based twin brother?

A. 20; 30

B. 30; 50

C. 50; 70

D. 70; 90

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34#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A meter stick is moving tompdj.0 seahp 9ks35t dw-1ki m-su5b(ward you with a speed of 0.80c. What is its length?

A. zero

B. $0.40 \; m$

C. $0.60 \; m$

D. $1.0 \; m$

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35#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How fast would a rock5gohzl*d11uf( k u a+qet ship have to move to contract to half of its proper length 1a(*ofduh zq5+ku1gl (as observed by a stationary object)?

A. $0.50 \; c$

B. $0.65 \; c$

C. $0.78 \; c$

D. $0.87 \; c$

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36#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The length of a spaceship is 10 m when it is at rest. If d,.ncd-xv*u jb*h.hjthe spaceship travels by you with a speed of 0.70c, what length cuj*.xd. - hdj* h,bnvdoes it appear to you?

A. $5.5 \; m$

B. $7.1 \; m$

C. $12 \; m$

D. $18 \; m$

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37#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The closest star to our solar system is Alpha Cent/w*ypi3. vnbx43zjmdde1acaj c1t/;auri, which is 4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earth travels toward the star. What distance does td j4 npjba x*wv3t;a ec1./1 3idz/myche space ship travel according to a passenger on the ship?

A. $2.58 \; ly$

B. $3.52 \; ly$

C. $4.12 \; ly$

D. $4.30 \; ly$

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38#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The closest star to our solar system is Alpha Centaf5 wxe -9dcadb;g-y7nuri, which is 4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earth travels toward the star. How much time would elapse on a clock on board the spacy -de5a-wgnd7f; c9 xbeship?

A. $3.23 \; y$

B. $4.40 \; y$

C. $5.15 \; y$

D. $5.38 \; y$

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39#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The closest star to our solar system is Alpha Centaug(6jgoog ubqmu tzs ,.b)(:/yri, which is 4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earth travels toward the s.(g gjtb oguy(6u ,osbq):mz/tar. How much time would elapse on a clock on the Earth?

A. $3.23 \; y$

B. $4.40 \; y$

C. $5.15 \; y$

D. $5.38 \; y$

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40#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is traveling at 0.85c. What is itso5 afhr1+dp (b mass? (The rest mass is $9.11 \times 10^{-31} \; kg$.)

A. $1.4 \times 10^{-29} \; kg$

B. $7.2 \times 10^{-30} \; kg$

C. $1.7 \times 10^{-30} \; kg$

D. $2.4 \times 10^{-30} \; kg$

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41#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the speed of a proton if its mas0v nzr/eg- d 78fm/gsns is twice its rest mass?

A. $0.50 \; c$

B. $0.68 \; c$

C. $0.73 \; c$

D. $0.87 \; c$

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42#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If the velocity of your spaceship goezn zmm -5mc. +6oaop/ts from 0.3 c to 0.6 c, then your mass will z+. to/o mm-aczm56pn increase by

A. 19%.

B. 38%.

C. 100%.

D. 200%.

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43#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the momentum in 5byb g.xknsax(x. 4;m $kg \cdot m/s$ of a proton when it is moving with a speed of 0.60c?

A. $1.2 \times 10^{-19} \; kg \cdot m/s$

B. $1.5 \times 10^{-19} \; kg \cdot m/s$

C. $3.0 \times 10^{-19} \; kg \cdot m/s$

D. $3.8 \times 10^{-19} \; kg \cdot m/s$

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44#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

During a reaction, an element 4g0vm jp/lw9 ploses $4.8 \times 10^{-28} \; kg$ of mass. How much energy (in Joules) is released?

A. $4.3 \times 10^{-11} \; J$

B. $1.4 \times 10^{-19} \; J$

C. $1.6 \times 10^{-36} \; J$

D. $5.3 \times 10^{-45} \; J$

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45#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

During a reaction, $1.7 \times 10^{-4} \; J$ of energy is released. What change of mass would cause this?

A. $5.1 \times 10^{-4} \; kg$

B. $1.5 \times 10^{-13} \; kg$

C. $4.8 \times 10^{-18} \; kg$

D. $1.9 \times 10^{-21} \; kg$

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46#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much energy would be released if 2b; z61m-ba6d tsqyy7 i.0 kg of material was lost during a reactiona76bdm 6by-tqz; i1y s?

A. $1.8 \times 10^{17} \; J$

B. $1.5 \times 10^{16} \; J$

C. $6.0 \times 10^{8} \; J$

D. $4.7 \times 10^{-8} \; J$

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47#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The amount of energy equivamgiw11 mseklxy :kl5n2l1r-, lent to two kilogram of mass at rest is

A. $18 \times 10^{16} \; J$.

B. $3.0 \times 10^{8} \; J$.

C. $9.0 \times 10^{16} \; J$.

D. none of the given answers

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48#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The atomic bomb that was droppe o1c8es90 qo t4asufy0lo;wd8 d on Nagasaki in 1945 killed 140,000 people, helping to end World War II on the next day. It released energy equivalent to that of 20,000 tons of TNT explosive. How much mass was converted to energy when this took place? (1000 tons o y0cw0;qf eo918osoa sutd4 8lf TNT = $4.3 \times 10^{12} \; J$) Incidentally, modern H-bombs have energy yields 1000 times as much!

A. $1 \; g$

B. $10 \; g$

C. $100 \; g$

D. $1 \; kg$

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49#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The kinetic energy of a proton is 80% of its total energy- bz h9q0fo.7e5uv tno. What is the speed of thvbque0 .zt h7no9o5f -e proton?

A. $0.02 \; c$

B. $0.87 \; c$

C. $0.98 \; c$

D. $1.0 \; c$

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50#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The kinetic energy of a proton is 80% of 02np17i*v1vzvaz )p r w/j rahits total energy. What is the momentum inh*1p 7jrni 2vw1 a 0a)v/zpvrz $kg \cdot m/s$ of the proton?

A. $5.0 \times 10^{-19} \; kg \cdot m/s$

B. $2.5 \times 10^{-19} \; kg \cdot m/s$

C. $5.0 \times 10^{-18} \; kg \cdot m/s$

D. $2.5 \times 10^{-18} \; kg \cdot m/s$

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51#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What energy is released (in MeV) during a re1i 9*zcj4.d4jpnsl y a0 ;y rhwwv,mn8action in which $1.67 \times 10^{-25} \; kg$ of material is converted to energy?

A. $5.0 \times 10^{-14} \; MeV$

B. $4.1 \times 10^{-7} \; MeV$

C. $3.1 \times 10^{-4} \; MeV$

D. $9.4 \times 10^{4} \; MeV$

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52#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much mass is lost duez6v1 wo-.r rs+2ex fpring a reaction in which $1.7 \times 10^{8} \; MeV$ of energy is released?

A. $1.8 \times 10^{-8} \; kg$

B. $5.7 \times 10^{-9} \; kg$

C. $1.9 \times 10^{-17} \; kg$

D. $3.0 \times 10^{-22} \; kg$

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53#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the total energy of an electron moving with a speedzfa6st ; (7a4ps b+kaxr-7a bo of 0.95c?

A. $2.6 \times 10^{-13} \; J$

B. $8.2 \times 10^{-14} \; J$

C. $1.1 \times 10^{-13} \; J$

D. $1.2 \times 10^{-14} \; J$

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54#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How many joules of energy are requiredre18f vhh3q8 q to accelerate one kilogram of mass from rest to a 8e f1qv3hh8 rqvelocity of 0.866 c?

A. $1.8 \times 10^{17} \; J$

B. $9.0 \times 10^{16} \; J$

C. $3.0 \times 10^{3} \; J$

D. none of the given answers

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55#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In a nuclear plant, azrp 7gq s9*m1 p:,9(bbi.jv4fu jvi g$1017$ J of energy is available from mass conversion. How much mass was lost?

A. $0.1 \; kg$

B. $1 \; kg$

C. $10 \; kg$

D. $100 \; kg$

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56#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is acceleratv h )mki dsy.h67mmfem3 -1b 45uhj,hjed through 100 kV. By what factor has its mass increased with respect to i hmk f-h.su7y jvjmh1be3m d)6m hi4,5ts rest mass?

A. 1.20

B. 1.55

C. 4.25

D. 8.00

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57#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

You are in a rocket traveling away from th,o wgm7tiq7p zdo943tjcgsmf *wkl02) b 5(gye Sun at 0.95c. You measure the speed of light f,ysczl gm3q450bwogig pf2 7t o km9j(w) 7dt*rom the Sun to be

A. 0.05c.

B. 0.95c.

C. 1.0c.

D. cannot be determined without knowing the frequency of the light

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58#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Two spaceships are travelin18 g a1jbdsnrm 3jq1*zg through space at 0.60 c relative to the Earth. If the ships are headed directly toward each other, what is their approach velocity, as measured by a person on either8 3rj11n dbzaqjs1mg* craft?

A. $1.2 \; c$

B. $c$

C. $0.60 \; c$

D. none of the given answers

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59#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A fast spaceship is traveling with a speed of 0.80c. How fast would lig306ok m/yj ihyyh(,ekht travel from the headlights of the shipy6j0/y(i , yk3e hokmh relative to a stationary observer?

A. $0.20 \; c$

B. $0.80 \; c$

C. $1.0 \; c$

D. $1.8 \; c$

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60#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A spaceship moves away from the Earth with am bg*mz2k;2 - nbagd+m speed of 0.80c. The spaceship then fires a missile with a speed of 0.50c relagnbakm+ gm2 dzbm; 2-*tive to the spaceship. What is the velocity of the missile measured by observers on the Earth if the missile is fired away from the Earth?

A. $0.30 \; c$

B. $0.50 \; c$

C. $0.93 \; c$

D. $1.3 \; c$

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61#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A spaceship moves away from the Earth with a speed of 0.80c ;q*)kvlslsgt rvzk. m/d0 .h+. The spaceship then fires a missile with a speed of 0.50c relative to the spaceship. What is the velocity of the missile measured by observers on z*; glr0/k .s+ vk.q)stlvmhdthe Earth if the missile is fired toward the Earth?

A. $0.30 \; c$

B. $0.50 \; c$

C. $0.93 \; c$

D. $1.3 \; c$

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Total:61 mks Pass:36.6 mks Duration:Unlimited

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