What is 10% of the speed of light?  In miles per hour.  Also in kilometers per hour?
435346
10% of the speed of light is roughly 1,116,000 mph (186,000 mp/sec * .1 and then mult by 60).\nIt is roughly 1,796,000 kph.
56541
You would be in a different universe than you are now, because the laws of our universe say that a massive object can't go faster than the speed of light (or even as fast).\n\nAlso, if you changed the question to "...1 mile per hour less than the speed of light", you would have to specify "relative to ..." (what?)  And then you would have to say, what would happen as observed by (whom?).  In this question, relative to you, the headlights would turn on and you would be able to see things 186,000 miles ahead of you (as you measure miles) within 1 second (as you measured seconds) .  Relative to the observer that thought you were moving 1 mile per hour less than the speed of light - assuming you were moving toward the observer - you would get to him or her just a tiny fraction of a second after he/she saw the headlights turned on.  Your measurement of the speed of light would be consistent, but your measurments of time and distance would be very different.
851776
E=mc^2\n\nwhere \n E is in joules or kg·m²/s²,\nm is in kilograms, and \nc equals speed of light, in meters/sec (approx 3*10^8)
40471
E=mc^2 \nEnergy = mass * (speed of light)^2, c = the speed of light (approx. 186,000 miles per second).
192010
lightspeed is about 186,000 miles per second and the sun is about 93,000,000 miles away.  Divide and you get 500 seconds, which is 8 minutes 20 seconds.
710963
its right.......... average speed= distance/time\n\nso average speed= 10*3/1\n=>30km/hr
931519
This question is extremely confused/confusing!  For one thing, the speed of light (exceedable only by warp drive) is wavelength TIMES frequency, not wavelength OVER frequency, as implied by two of your lines.  Any Starfleet Academy student should know that.\n\nIgnoring that, I THINK that the nub of your question is this: presumably v/c is small in the original question that you must have been asked.  Call that small value x.  Then, for small x, a BINOMIAL SERIES expansion (NOT a Taylor expansion) tells you that \n(1 + x)^(-1) is approximately 1 - x, ignoring terms of order x^2 and higher.\n\nLive long and prosper.
63805
Actually there is no speed of dark.\nBut according to me it should be the same as the speed of light because as soon as the light goes the dark appears.So it must be as the speed of light i.e. 3* 10^8 meters/seconds
799573
speed of light in vacuum: c = 3.00 x 10^8 m/s\nThe speed of light is typically represented in m/s.\n\nThe speed of light in a vacuum should not be the same as the speed in a non vacuum.\nhttp://cord.org/step_online/st1-1/st1-1ei3.htm
6671
The exact speed of light is 299,792,458 m/s\n\nTo be precise, what we usually call the "speed of light" is really the speed of light in a vacuum (the absence of matter). In reality, the speed of light depends on the material that light moves through. Thus, for example, light moves slower in glass than in air, and in both cases the speed is less than in a vacuum. However, the density of matter between the stars is sufficiently low that the actual speed of light through most of interstellar space is essentially the speed it would have through a vacuum, so we don't make much error by ignoring the difference.\n\nTo make it easier for you to convert, here is the speed in alternative units :\n\n(1) 983,571,056.4304461 foot/second\n(2) 11,802,852,677.165352 inch/second\n(3) 1,079,252,848.8 kilometer/hour\n(4) 299,792.458 kilometer/second\n(5) 582,749,918.3585312 knot\n(6) 880,991.0899527 mach\n(7) 670,616,629.3843952 mile/hour (mph)
13401
It's true that the speed of light is constant no matter what speed at which you or the source is moving.  This is a fundamental postulate of relativity, and there is no explination.  It's just accepted because our experiments indicate that it is true.  You used the formula "lights speed + X = actual speed"  this type of velocity addition is called "Galilean".  It turns out that speeds don't actually add that way.  Far out.\n\nWhere is the rest of the energy? Good question.  The frequency of the light you observe from the sun DOES depend on how fast you and it are moving.  The energy of each photon is given by E = hf, where f is the frequency of light.
1187636
Light always travels at the same speed in a vacuum, the speed changes ever so slightly when it has to go through a different medium (water e.g.) but its so fast to begin with you wouldn't really notice it. 300,000 kilometers per second is beyond human comprehension, I mean you can only imagine how fast that is, you can't experience it or 'know' it.
886711
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning "swiftness". It is the speed of all electromagnetic radiation in a vacuum, not just visible light.\n\nIn metric units, c is exactly 299,792,458 metres per second (1,079,252,848.8 km/h). Note that this speed is a definition, not a measurement, since the fundamental SI unit of length, the metre, has been defined since October 21, 1983 in terms of the speed of light: one metre is the distance light travels in a vacuum in 1/299,792,458 of a second. Converted to imperial units, the speed of light is approximately 186,282.397 miles per second, or 670,616,629.384 miles per hour, or almost one foot per nanosecond.\n\nThrough any transparent or translucent material medium, like glass or air, it has a lower speed than in a vacuum; the ratio of c to this slower speed is called the refractive index of the medium (the actual speed is not affected, the speed of light is constant, the fact that the light is reflected around inside the glass will make a greater amount of time necessary for it to reach the next point). Changes of gravity, however, warp the space the light has to travel through, making it appear to curve around massive objects. This gives rise to the phenomenon of gravitational lensing, in which large assemblies of matter can refract light from far away sources, so as to produce multiple images and similar optical distortions.\nclick here:http://en.wikipedia.org/wiki/Speed_of_light#Overview
11469
the speed of light = 299 792 458 m / s
714988
About 1,000 miles per hour at the equator. Slower if you are closer to the poles. I think it is about 800 miles per hour at latitudes typical in the U.S.
426747
The speed of light is a measurement of how fast light travels in a vacuum. The speed of light also known as "c" as in the famous Einstein equation E=mc^2. And its equal to 299,792,458 m/s or in U.S miles per hour is about 670million miles per hour!!!!!!! It would take light coming form the sun only 8 seconds to arrive on earth which is 92million miles away. Now say "WOW!!"
365082
Why, how is it moving 1.2 times the speed of light?  Anyway, you just use the age of the Universe and multiply by the velocity of the particle.  5 billion years times 300km/s time 1.2