When fired from a weapon, a 10 kg projectile receives a kinetic energy Wk of 1.8 MJ. Determine the kinetic energy Wk of the weapon due to recoil if its mass is 600 kg.​

1) When her husband came home, Anne was watching television.

2) I was preparing dinner when the telephone rang.

3) What were you doing when the postman arrived?

4) Julie learnt to drive when she was working in London. 5) Where were you sitting when the show began?

6) I visited Athens while I was touring Greece.

7) It was when he was crossing the street that John fell. 8) What did you see while you were waiting for the bus? 9) Where were yоu going when your car broke down?

10) Julie met Peter when she was walking in the park.