It takes him
t = 16 miles / 156 mph = 0.1 hours
Answer:
because potentil energy is redy to go but its bound up
And kinetic energy is in motion
Explanation:
Answer:
the energy from the sun travel to earth the answer is A .through the radiation
Explanation :
The forces acting on hot- air balloon are:
Weight, (W)
Force due to air resistance, (F)
Upthrust force, (U)
Its weight W is acting in downward direction. The upthrust force U acts in upward direction. When the balloon is moving upward, the air resistance is in downward and vice versa.
In this case, the hot-air balloon descends vertically at constant speed.
so, 
and 
so,
....................(1)
when it is ascending let the weight that it is releasing is R, so
..........(2)
solving equation (1) and (2)

2F is the weight of material that must be released from the balloon so that it ascends vertically at the same constant speed.
Because many fuels are fossil fuels they take millions of years to form and the known reserves are being used much faster than the new ones being made