Light waves travel with the speed of 3 xx 10^(8) "m s"^(-1). Express the speed in miles are per hour.

Light waves travel with the speed of 3 xx 10^(8) "m s"^(-1). Express t

1.	Light waves travel with the speed of 3 xx 10^(8) "m s"^(-1). Express the speed in miles are per hour.
Answer» Solution :`1.6 xx 10^(3)m=1" MILE" :. "conversion factor"=(("1 mol"))/((1.6xx10^(3)m))` `3.6 xx 10^(3)s=1HR:. "conversion factor"=((1hr))/((3.6xx10^(3)s))` `(3xx10^(8)m)/(1s)=((3xx10^(8)m)xx("conversion factor"))/(1sxx("conversion factor"))` `=(3xx10^(8)m)xx(("1 mile"))/((1.6xx10^(3)m))xx(1)/((1s))xx((3.6xx10^(3)s))/((1hr))=6.75xx10^(8) "miles/hr"`.