If a satellite or spaceship explodes in outer space, you can see the explosion from a distance but you cannot hear it. why?
a. light waves travel very fast and sound waves travel much slower.
b. sound waves transmit energy while light does not transmit energy.
c. sound is a mechanical wave and needs a medium to travel through while light is an electromagnetic wave.
d. light is a mechanical wave and needs a medium to travel through while sound is an electromagnetic wave.

c (diamond),

sio2 (quartz)

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