The speed of light in a vacuum is 2.998*10^8 m/s what its speed in kilometers per hour

The answer is 1=1.079e+9.

Hope this helps! :D

2.998*10^8m/s          1hr                                        K H D B D C M

        =4996666.67 m/hr =   4996.67km/hr

       1                       60sec.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

diaria maybe go see a doctor about that