Question

the speed of the light is 400 000 km/s. Express this speed in cm/s in standard form

Answer 1

Answer:

$4*10^{10}$

Step-by-step explanation:

1 km = 1000 m

1 m   = 100 cm

so 1 km = 1000*100 = 100 000 cm

400 000 km =  400 000* 100 000= 40000000000 = 4*$10^{10}$ cm

speed = 4*$10^{10}$ cm/s

(I think speed of light = 300 000 km/s)