Morning is the time the air is the calmest. As the sun comes out, it heats up the ground and lakes and causes air to rise to create turbelance. Most test flights are flown early in the morning. Also most rocket launches are performed early in the morning.
The Man With No Brakes is the best at air time.
More or less. Air can leak from a container, because it is a fluid. However, "leaking air" wouldn't necessarily be correct all the time, so use your best judgment.
It will be very difficult to find good air purifiers for less than $50 during this time of year, since summer usually is the best time to buy air purifiers. You can try to go visit home appliances stores such as Home Depot or Walmart. Using the Walmart website: http://www.walmart.com/cp/Air-Purifiers/46324?bti=1 this has a air purifiers under $50.
It will take less time.....Because the speed of sound in water is more than that in air :)
I, personaly, think that the best time to exercise is morning because the morning air is fresh and you are energetic at this time.
Neon, ammonia, methane, hydrogen, helium and water vapour are the best lifting gases and are all less denser than air.
The air Jordan 11
when they are cold....
Warm air is less dense (lighter) than cold air..that is why warm air rises and cold air settles
A battery powered cooling unit can be less effective over time. Over time the batteries lose power and the fans run a little slower, not pushing as air through the system The less air pushed through the system the less effective the pad
For direct flights, about 1 hour or less flying time. This is time 'in the air' and excludes ground activities.
Higher altitude air is less dense. Less density means less air; less air means less friction, and less friction means a higher speed.