Boorang Posted July 24, 2018 Share Posted July 24, 2018 (edited) A vehicle moving at .927c moves in a straight line from mars to earth. a signal moves from earth to mars. what is the time difference in minutes between the arrivals? Edited July 24, 2018 by Boorang Link to comment Share on other sites More sharing options...
HansonKerman Posted July 24, 2018 Author Share Posted July 24, 2018 What's .0927c mean? Link to comment Share on other sites More sharing options...
Boorang Posted July 25, 2018 Share Posted July 25, 2018 19 hours ago, HansonKerman said: What's .0927c mean? slightly over nine-tenths of the speed of light. its decimal. also it is 0.927 (or .927), not .0927. Link to comment Share on other sites More sharing options...
HansonKerman Posted July 25, 2018 Author Share Posted July 25, 2018 Whoops. Link to comment Share on other sites More sharing options...
Delay Posted July 26, 2018 Share Posted July 26, 2018 .927c relative to what? Link to comment Share on other sites More sharing options...
HansonKerman Posted July 26, 2018 Author Share Posted July 26, 2018 @Delay, please stop Delaying.m Just answer. Link to comment Share on other sites More sharing options...
FireKerb Posted July 27, 2018 Share Posted July 27, 2018 But the speed will vary from using the Sun as a reference point and the Earth. Link to comment Share on other sites More sharing options...
HansonKerman Posted July 27, 2018 Author Share Posted July 27, 2018 Just answer already!!!!!! @Boorangwill tell you after 2 wrong guesses! Read the rules! Link to comment Share on other sites More sharing options...
0111narwhalz Posted July 31, 2018 Share Posted July 31, 2018 The answer requires additional information. This includes: 1. The reference frame in which the time is measured 2. The angular alignment of the planets 3. The definition of the emission time 4. The definition of the arrival time The Lorentz factor of an object travelling at .927c is approximately 2.666. This means that a second as measured in the object's reference frame is equal to 2.666 seconds as measured in the reference frames of Earth and Mars. Earth's semimajor axis is approximately 1.496*10¹¹m. Mars' semimajor axis is approximately 2.2792*10¹¹m. Their distance, therefore, varies from 7.832*10¹⁰m at closest to 37.752*10¹⁰m at furthest. This is equal to 261.5–1260.5 light-seconds. An object traveling at .927c will close this distance in 282–1359.8 seconds in the reference frame of either planet (which, while not motionless, have relative motion of much smaller magnitude), but only 105.8–510.05 seconds in the object's own reference frame. Of course, the light takes less time in the object's reference frame because of apparent length contraction (light travels at c no matter the reference frame). From the object's reference frame, the light will take 105.776–472.806 seconds. The difference in elapsed time, therefore, ranges from 21–99 seconds in the planetary reference frames and from .224–37.247 seconds in the object's reference frame. For the question to be meaningful, we must assume that the signal and the object were emitted simultaneously. However, this has several different possible meanings. In the first, the emissions are simultaneous in some omniscient reference frame. In the second, simultaneity occurs in the Mars reference frame. In the third, simultaneity occurs in the Earth reference frame. For the first, no adjustment must be made. For the second and third, the signal or the object's light have already arrived, and so the entire travel time of the light must be added to the object or the signal, respectively. We must also consider the differences in the measurement of the arrival. In the first case, the arrivals are measured in some omniscient reference frame. No adjustments are necessary. In the second and third, the arrivals are measured with respect to the Mars or Earth reference frames. The travel time of the light must be added to the object or the signal, respectively. These extra cases thoroughly confuse the issue, altering the answer by as much as ±523–2521 seconds, depending on the planetary alignment. There are eighteen possible experimental arrangements, by three different variables, at any given planetary alignment. Link to comment Share on other sites More sharing options...
HansonKerman Posted July 31, 2018 Author Share Posted July 31, 2018 please, just guess. Changing rules now. Link to comment Share on other sites More sharing options...
0111narwhalz Posted August 1, 2018 Share Posted August 1, 2018 16 hours ago, HansonKerman said: please, just guess. Changing rules now. It's a complex question which can provide interesting insight! How am I supposed to "just guess?" Link to comment Share on other sites More sharing options...
HansonKerman Posted August 1, 2018 Author Share Posted August 1, 2018 PLEASE OR ELSE I WILL COMIK SANZ U Link to comment Share on other sites More sharing options...
0111narwhalz Posted August 3, 2018 Share Posted August 3, 2018 On 8/1/2018 at 6:05 AM, HansonKerman said: PLEASE OR ELSE I WILL COMIK SANZ U I gave an answer, what more do you want from me? Link to comment Share on other sites More sharing options...
Deddly Posted August 6, 2018 Share Posted August 6, 2018 OP has requested that this thread be locked. If anyone would like to revive it, please report this post and put your request in the report box, thanks! Link to comment Share on other sites More sharing options...
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