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: _____________

User Name: No Login Start Time: 23年05月01日 10:04 Switch to Whole-Paper Mode

1#

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

You are riding in a spaceship that has no windows, radios, or other ment 8 +du4oz/7qrn o)h8nmg4 dkans for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant vel4k o +7ndotn)hznq/ 4ur8m d8gocity. 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 d3mlr r/ nr*3kns2yl7zesigned 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 c-eye 2u*cu7o woncluded from the results of their 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 the followia:.zvo6(5 cu(wuu 4m)f fac dxng 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 priluk0zu 3dg 4xm) d 9bla8t*/ubnciple.

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6#

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

State the three unprovable assumptions of Galilean-Newtonian re a)w0;e6lvnhh ccd4 l.; pr*q)hfc/ qllativity.

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7#

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

The theory of special relativ.0rg+rl-upvh ab: nvam)3g u9+, iummtmy .r2ity

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 formulay; op-qsh18cl4hg g +kting the special theory of relativity was that the laws of physics are the same gcpg h8;l4-h1+syokqin 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 relativity. ohtironp* ; 6 0;(qkmu8jx5xc

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10#

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

State the second postulat5tqxa;;gt t2g e 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 spaceship movinweua6,bkc2j 4g away from the Sun at a speed close to the speed of light, you would finja4 kuwcbe,26 d 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 moving clogksrr9(. (c2 ksqmml2(hiv0 ack

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 defie s(livlr)fdc2w3k e /6(cy6qned 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 verur0:+,oja87y vxj 7r8i iad vmy high speed to a distant star and back again, while the other twin remains on Earth. The twin that remained on Earth predicts that the astronauivri+u md8,0axoy: 77a 8rjvj t 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 observer, a moving 4un,w t8 sf4e9tr6 oeqa7sw(f 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 itpaaaj4) 1s 4bls length with a velocity that approaches the velocity of light. The width of this object, as measured bya4ap 1sb) jla4 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 par 7zs f ,1s8tvluip*lu/allel to its length with a velocity that approaches the velocity of light. The length of this obv 1zps 7/llfi ut8,us*ject, 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 t w93pft+u 3krnhe particlk33+9 urpwfnt e

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 o 2.:j j2p6mv1e oerlr4tkmk 1kf light, the momentum of the particle4:62 1m jkl vmk1t.2oprrkeej

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 vl(e*bgf/q 3md1kl 5 nmery high speed. As it passes, you measure its length at one-half its normal length. From this measurement, you conclude that the moving spear's mass ml1g3mk dbqef m(*ln5/ust 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 z (,pkw tv-bbi*n2tv9energy of a speedy proton when its relativistic mass dw2k-zvb*b 9pt it(nv, oubles?

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 eneunq(*i(1 z )kvme/cu grgy of a speedy proton when its relativ/qv z1 gm(e cik()unu*istic 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 maska(d+ctt v)s;:ps -g zs $m$ 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 0ngwzo5:qlk )4yc ;ya.tw hi,3.50c in a straight line. Ship A is moving directly away from the Sun and ship B is approaching the Sun. The science officers on each ship o .gi)zn:aqlkwc, yt3y5h4 ;w 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 de-3b xgp*ynf/ ppends 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 wouldm(b7 29eqhsx;e cos r( 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 i:e1oa/ydq0fm n still water. With what speed, relative to the shore, :df a/e1 0mqoydoes it move in a river that is flowing at 1.0 m/s if the boat 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 m/s in still water. With what speexmpe+q:g* h)hd, relative to the shore, does it move in a river that is flowing at 1.0 m/s if the boat+qg*x:) h phme 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 spee9qmxxa xfb.58u( 4jlf d, relative to the shore, does it move in a river that is flowing at 1.0 m/9x.j8xu (mxba4fq5 lfs 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 observed by a std t(dmdk+iqo 6 ep/v6lby) )j5ationary observer as ruiyvjomke d)q6lpdb 5( /)6+dt nning 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 jourgr hlwq uy 1v71)p,/ rwbm5wy:ney to a planet and returns in 10 hours according to a clock on the myvh 5r p,y )1bw:1wrgq l/7uwspaceship. If the 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, are inidmf+n -)x*7c7uiizp ptially 10 years old. While Courtney remains on Earth, Andrea rides on a space ship which travels away frominx*i)p z+d p7u-m7c f 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 takes a space trt3x (gja0alvkimi2 -0tt5ii 0 ip with a speed of 0.80c for 30 years according to a clock on the spaceship. Upo tvt-tki 02axi 500(l3giamijn 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 toward you with a sy-o )d6 1x2jcfsrq*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 s 4ld+sqi,rl +bhip have to move to contract to half of its proper length (as osl,rdi+l b4 q+bserved 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. Ifdis8)86c rn jg the spaceship travels by you with a speed of 0.70r ds68jig)n c8c, what length does 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 Centauri, which is 4.30 liz )a/ u)bk/zhzght years away. A spaceship with a constant speed of 0.800c relative to the Earth travels toward thez zbz/u))a h/k 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, d-qjj+rg 28:sc p9uknav 3:bcwhich is 4.30 light years aw:cj rj u ng:qd-+acp 2vkbs938ay. 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 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 Alph- t;sive )t/vy5jb yw9dq0yh(a Centauri, 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 t /e djqyyi s;yv59tt)h(bw-v0 he 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 0.85ccqa)(+0mz2oruu,i j i. What is 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 proton ia(wc*jc; u gq+f 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 im6yrjx y 5:;qk2hmp1your mass will inci mkmy;qrxjy615:2h p rease 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 a 3fpo3s*cw a4in $kg \cdot m/s$ 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 elementjadvasb)6 q 8( loses $4.8 \times 10^{-28} \; kg$ 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 2jd sugwm :b)rq6, 2 (oq(5dkrx.0 kg of material was lost during a reactionk(q6,rg2ju5q rso dd wmx ):b(?

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 equivalent to two kilogram of mass at rests8b- in1x ,wdpw6o;3cqokj2ds:,t yk 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 drmpvavo): ca 7p1blh,/opped on Nagasaki in 1945 killed 140,000 people, helping to end World War II on the next day. It released energy equivalent,:v/vcpp lb1om aa )7h to that of 20,000 tons of TNT 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% o .ct3p-:fk/9cz fvfbv+/r iazf its total energy. What is the speed of tkb- a/ z3:. fcvrt pv+/fzfci9he 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 u0sq+lu/9* n 0 1 gsxx34xkrnei.iqrl is 80% of its total energy. What is the momentum . ng0+lx43ul90i qx1seui* nrxks/rq 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 reaction in which p y9;ju hs9u5w$1.67 \times 10^{-25} \; kg$ 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 whiv-au1lj. qv d1/jt hz;ch $1.7 \times 10^{8} \; MeV$ 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 ener e8up.b u1jl8egy of an electron 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 kiloz /idaid-v 9l.yndz txe.)8rl,r -g-rgram of mass from rest to a velocity of 0.866 c? drii9)-,degn. -lrz tv/z8d -a.yrxl

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, +peqp 7xj+q,uxpm9v/ $1017$ 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 nphty8g) r3f 6100 kV. By what factor has its mass increased with respect ton tgr863ph f)y 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 j pf0mga/1 dk+away from the Sun at 0.95c. You measure the speed of light from the Sun pm g k+afdj0/1to 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 relative to the Ea32xm m3 dgdq*yrth. If the ships are headed directlmd 3 gm*dy3q2xy 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 speed of 0)2vdy 8yale(q .80c. How fast would light travel from the headlights of the ship relative to a stationary obv yld2 a(8eqy)server?

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 0.80c. The spaceship thenth j-;orn0.j7bfw )6woor1 s n fires a missile with a speed of 0.50c relative to the spaceship. What o1 nfrbjhw07t.js)wo n r-o6; 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 wihl7 8p 6dqvahqh8pi0-th a speed 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 missilha i80 7hd h-lpqqp68ve 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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