Aplane wall with constant properties is initially at a uniform temperature to. suddenly, the surface at x = l is exposed to a convection process with a fluid at t[infinity](> to) having a convection coefficient h. also, suddenly the wall experiences a uniform internal volumetric heating q that is sufficiently large to induce a maximum steadystate temperature within the wall, which exceeds that of the fluid. the boundary at x = 0 remains at to.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?