An airplane is flying through a thundercloud at a height of 2000 m (This is a very dangerous thing to do because of updrafts, turbulence, and the possibility of electric discharge.) If there is a charge concentration of 40 C at height 3000 m with the cloud and -40 C at height 1000 m, what is the electric field at the aircraft

Explanation:

= Charge at 3000 m = 40 C

= Charge at 1000 m = -40 C

= 3000 m

= 1000 m

k = Coulomb constant =

Electric field due to the charge at 3000 m

Electric field due to the charge at 1000 m

Electric field at the aircraft is .

heats surface water up

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards