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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 has no windows, radios, or .qjm,1*t, xauev4j d d)qf2etother means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. What should you 4*2q ejudvqf)t.mdt1,ae,xj 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 .x(uqoz juhlr+n-)(.b4wb9fgj7 jk4no.kpf was designed to 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 theioq2-ixju9* ojea7fc3c br a51r 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 interferometer yourself if you use. bu ,c2/c fx+v+y exarfgg*m+ 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 principl3t.jcwb8s(h j:dqm vn6m1hrh0 ,cz v 3e.

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6#

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

State the three unprovable assumptions of Galilean-Newtonian relatb7yq nahj2fu69 u5f.qivity.

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7#

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

The theory of special rela)dypqs j.r-i9 tivity

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 th /go7j7u6-enf;y)dcr) gb jzie special theory of relativity was that /oj)7d-ufgr nzj c7gbi6y)e; the 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 specia:*g//1v m+ag/cw k m c*w: wdajdh2imzl relativity.

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10#

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State the second posdtguf 4cf9s4-xvb6j *tulate of special relativity.

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11#

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

If you were to measure your pt0d gqe/6gcbu(gc+ imu w ,9tu8k.:vxulse rate while in a spaceship moving away from the Sun at a ,vg8g6txkc(dgc u 9/wm i+0btq:eu.uspeed 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 observer, a mtt, +muepq5, o+hhk1c3/kti ooving 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 defulnlc/h 78,k4ei7 yxoined 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 high speed (i+zi ir3sdazttp10.ke( 5ljna5wu; to a distant star and back again, while the other twin rep;ii r 3lkti d1(n jz.sza50weu(5a+tmains 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 obser ;cgjq, 0hihb ;01f::s*jx n 8nhszanvver, 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 parallel to its length with a velocity that appn (jf )m;;0;*bexbya vcym0e qyh 9 )rufx-)sproaches the velocity of light. The width of this object, as measureh0-xxu efyb;q)9;vy)c yrpn 0m;m( *afj )sbed by a stationary 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 witxygpx(f5ly0e 2;,c skh a velocity that approac2(xs; f0gky,y x elpc5hes the velocity 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 h24wyjn+6s0g yi tt dn1m1y; blight, the mass of the particl1;wb4+hy gs ny106 tiy njmt2de

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 approaches the speed of light, the momentum oxv a*/jr h) fbc 3fj2;,o- fdvzco)4puf the pard4haofru,f/pzvb3f))o c j* xv;j2c- ticle

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 i3arq2epz-rqf idx)s.n l2+8 a very high speed. As it passes, you measure its length at one-half its n8qzq )f nrx.3pa 2l idres-2i+ormal length. From this 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 its relativistickz,ircwyg6i ee8;4sd7dc)wyp l r:); mass ci)r6lgz yec s): pw;e,kd dw;ryi487 doubles?

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 a speedy pros 9q)g9g1qpq *idm5 xoton when its relativistic)pxq9m 95 iq qo1*dsgg mass doubles?

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 masm 0j :)iesmn46-uv* ,tukrw.rtm2 vhqs $m$ 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 0.50c in a st:t8ze8 btm :enxus37 craight line. Ship A is moving directly away from the Sun and ship B is approaching the Sun. The science officers on each ship measure the velocity of light coming from the Sun. What do they measure for this velo8te87z:tcs : ub nxe3mcity?

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 depends on the observer's frame og,*nok5e0q* hjjf 4vv f 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 woul, ibkn(p366r)an us-6mcmcb md observe

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, relative to the v. pgve .1)fcushore, does it move in a river that is flowing at 1.0 m/s if the ep).c v1u. fvgboat is heading upstream?

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 jz:uvq 3;a/vqm/s in still water. With what speed, relative to the shore, doesaj;v zq:uqv /3 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 still water. With what speed, rel/ze5-sqk2m rxt-pk v 7ative to the shore, dek2m7 -t5qp/r- xskzvoes it move in a river that is flowing 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 if it is to be)2z;yj k* 4ih dd2qao ib)qk1p1qyuz2e9zu 0n observed by a stationary observer as running at one-half iu); )0idpde2q4qzhbz j2y 2z 1 kiquna*oyk91ts 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 in hfs au( zj4at) 0my8e*10 hours according to a clock on the spaceship. If th*8yam )a0 j(4thu sezfe speed of the spaceship is 0.80c, how much time has elapsed on the 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, a19qq r;ppusq. re initially 10 years old. While Courtney remains on Earth, Andrea rides ;9q pqqurp1.s 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 Andrea 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 tcw)ih0bq q3 )zakes a space trip with a speed of 0.80c for 30 years according to a clock on the spaceship. Upon returning to the Earth, what is his own acq )qwh) 0izb3ge 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 movzecx+ -:fd;x-x8i wri gqw .c9r.u3 uhing toward 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 rocket ship have to move to contract to half ofxn vcd ndt7x.cy) 5(0w(n9dam its proper length (as observednvn7tm .ncw ydxd( xc5)a(9d0 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 tvd atb5m aezbkz(+588he spaceship travels by you with a speed of 0.70c, what length does it appear to you m5z58bda8 +baeztkv(?

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 ste9n2; 0lh jfumy6 tzeov+ .vu7kxw8-olar system is Alpha Centauri, which is 4.30 light years away. A spaceship with a constant speed of 0.800c relative - 0z.9+ovv t;txf u2hn7wke6jyu l8meto the Earth travels toward the star. What distance does the 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 Centauri, whicmknh8j 6rm8(k h 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 time8r86 n mkm(khj would elapse on a clock on board the spaceship?

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 Alph0yp g 1)ff ghgkply+cie+*m26a Centauri, which is 4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earth travelg) kmg+hp y*fgfc0i 621+elpys toward the star. 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 bzax /o++3gg ho,8 h8t hkkdp4is its 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 mjksk(p3e-l78 2 zh nmproton if its mass 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 goes from 0.3 c to 0.6 c, then your mass .v db7zku4e.pwill ince47 .pkbzu v.drease 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 l-togg3w/g5q in $kg \cdot m/s$ 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 loszl 0wkej ) :(2u brogj/khc(+5j wq3pnes $4.8 \times 10^{-28} \; kg$ 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 releasbyj2y)1y* qqka .8k yeed if 2.0 kg of material was lost during a reaction1 )yyqaj ekyb*2.qk8y?

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 equival: hip:wo om+99u9awtqent 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 thatqqc9+dpb/ 2 u g3*ehnj was dropped 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 T 2njpq* q9 hde3+/gucbNT explosive. How much mass was converted to energy when this took place? (1000 tons of 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. What isrn:pax(.u t (t the speed of tp:(.rxa unt (the 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 profbq-x 1o7lnb*9a b/ jcton is 80% of its total energy. What is the momentuml ab- 7 bnfq*cj91xb/o in $kg \cdot m/s$ 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 re*dm bu0xyc 0-c) loes gbx/2e7action 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 during a reaction in whicud-gt f25u ioeg/vz 05h $1.7 \times 10^{8} \; MeV$ 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 ele3uxhh a8 )ujk:yt*3fo zn. p1rctron moving with a speed 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 required to accelerate one-+zw0gc-s;x kv) fdxv kilogram of mass from rest gx-z 0s vkfc -x;d+v)wto a velocity 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, zs++dn k3 ,i4oc 1my5xwer9ol$1017$ 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 accelerated through 100 kV. By what factor has 25u8we.l s pvmits mass increasee2mv l8wp u5.sd with respect to its 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 the Sun aro sa:k t2gh0;t 0.95c. You measure the speed of light0:t 2; ahgorsk from 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 traveling through space at 0.60 c t25f + yd)eayy (xdmh.relative to the Earth. If the ships are headed direct( exdhy2d yft.m) ay5+ly toward each other, what is their approach velocity, as measured by a person on either 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 speedsy h-am9occs7*4 ow j5-*qnu88qz trk of 0.80c. How fast would light travel from the headlights of 7q* -sot* zk9u-ra 84w cm noj8hcys5qthe ship 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 a speed of 0) hi +9jdq;tjt6 gor2i.80c. The spaceship then fires a missile with a speed of 0.50c relative to the spaceship. What is the)jg;qd9r6t ito+ ih2j 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 nzn(cgv0 ac((k15thnspeed of 0.80c. 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 the Earth if the misstg( hn50 c(z avnn1(kcile 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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