Planes make the same sounds whether in the day time or night time.
At night-time there are less sounds from traffic and people - therefore any sounds that are heard seem louder.
You should be able to hear this as good at night as any other time. There are fewer planes in the air at certain times and night time is one of them.
Helicopters has a limited range compared to planes. Planes need a long pave to operate while helicopters can take off and land a lot more places. Also helicopters can "stand still" in the air while planes need to move all the time. So depending on what you want to do they have different (dis)advantages.
Yes. Liken it to the fastest mode of transportation in his time, for example, the horse, as compared to the automobile, jet planes, trains of our time.
In space there is no fixed time like earth. As there is 24 hours sun not like earth with day and night.
No because the air around the plane has pressure. If two planes take off at the same time the planes will crash. The planes might crash if they land at the same time.
Compared to Earth, Mars is colder at day and night because of its greater distance from the sun.
Maybe... If you believe!
Planes are not perfect but they are not the worst to fly in because it can be safe but it cant be sometimes most of the time it is great to fly in so most of the time planes are safe.
This sounds as a riddle.. Could the answer be... hmmm. Shadows?
they built planes because it was mans dream at the time
In geometry, two planes intersect in a line. The only time this is not true is if the two planes are parallel to each other.