A satellite is a circular orbit radius 7000 km around the Earth. If it is transferred to circular orbit of double the radius,
`{:(,"Column I",,"Column II"),((A), "Angular momentum",(P),"increase."),((B),"Area of Earth covered by satellite signal",(Q),"decreases."),((C ),"potential energy",(R ),"becomes double."),((D),"kinetic energy",(S),"becomes half."):}`

Explanation

(P) Pressure above surface xx area
`piR^(2)xxrhogh`
(B) Pressure below bottom xx Area
`=(2rhogh+2rhogh)piR^(2)=4piR^(2)rhogh`
(C) `F_(v)=underset0oversethint rhog(h+x) dxxx2R=rhoRg^(3)h^(2)`
`F_(r)=underset0overseth int ((2rhogh)+(2rhogx)) 2Rdx`
`=4rhogh(3h^(2))/h Rightarrow 6rhoRgh^(2)`
`total=9rhoRgh^(2)`

`F_(Buoyancy) =rhoalphapR^(2)hg+2rhopiR^(2)hg`
`=3rhopiR^(2)hg`