The fabric of the hot air balloon can stretch, but it does not allow air to pass through it. think about the change in air density you expect as the pilot adds hear to the air in the balloon. what change would you expect to see in the fabric of the hot air balloon. explain

It would definitely stretch and wouldn't do anything as long as there is no holes in it.

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.