What is the speed of sound in kph

Sounds is measured in what unit ? its my last questions ok !!!

What is the speed of light through perspex a plastic with an index of refraction of 1.495?

what is the speed of light really really???

Which is faster,the speed of light or the speed of dark?

How much time does moon's light ray takes to reach earth?

Explain what characteristics of a sound wave allow you to be able to distinguish between a car horn and the trumpeting sound ...

So I was outside and saw some jets fly overhead. It was quiet when they passed over then I heard the noise a few seconds late...

Why is the speed of light (186,000 miles per second) considered the maximum velocity at which anything can travel?

How do you find the speed of an object without a given time.the problem is "an archer fires a 30-kg arrow form a bow the arch...

I read that if you travel at the speed of light you can go back or forwards in time...how is this possible, I'm finding it ha...