What is the speed of light in Km/sec?

300,000km/s

I found this, more exact figure

299792.458km/s

Just a comment on the numbers provided above.

"m if you please" apparently found a source that gave an accurate figure for c (the speed of light) in km/sec.

"catherine k" gave a similar figure, but not exactly the same number.

So maybe you don't know which value to use.

Suggestion: Use "m if you please's" value.

While "catherine k" did the correct calculation, she did not consider the accuracy of the numbers she used in the calculation when she decided how many digits of her answer to report. She used a speed of light that is accurate to 3 significant digits. She multiplied by the number of kilometers in a mile, which was accurate to 4 significant digits. So in her answer, we can't rely on more than the first 3 digits (i.e., base it on the least accurate of the factors that went into the calculation).

In a given strength of univrsal gravity, speed of light is constant and is almost 300000 km/sec.

the speed of light is 300,000 or 3*10^5 km/sec.

nothing can travel faster than the speed of light.

300,000 km/sec that's what Einstein said but don't you think that it's too much I mean whenever I light up my torch the light looks so ordinary.

the speed of light is 186,000 miles/sec, and there are 1.609 km to a mile, so, using the factor label or dimensional analysis method:

186,000 mi/sec x 1.609 km/1 mile = 299,274 km/sec.

300 000

300k

In or out of a vacuum?

300.000 km/s

186.000 m/s