Giving brainliest!! if you answer correctly :) (30pts)

mass = e/v

= 50/5

= 10 kg (c option)

and I'm muthafu.ckin genius

option A 4kg is your answer

Explanation:

given

mass(m)=?

velocity (v)=5m/s

we have

kinetic energy =50J

1/2 ×{m×v²)=50

m×5²=50×2

m=100/25=4 kg

d) physical means can be used to separate the components of air.