What are two places that have no air resistance?

What are two places that have no air resistance?

When an object falls in a vacuum, there is no air resistance because there is no air in a vacuum.

• A rock and a feather are released from rest from the same height with air resistance on.
• A rock and a feather are released from rest from the same height with air resistance off.

Does hail hit terminal velocity?

“Research has found that a hailstone’s terminal velocity is roughly proportional to the square root of its diameter, with a diameter of 1 cm corresponding to a terminal velocity of 50 km/h (Munich Re, 1984).” “Hailstones can reach a speed of 90 mph (140 km hr–1) as they fall to the ground!”

Why can free fall occur only when there is no air?

An object is in free fall only if gravity is pulling it down and no other forces are acting on it. Because air resistance is a force, free fall can occur only where there is no air.

Why do all objects hit with the same velocity ignoring air resistance if dropped from the same height?

Why do all objects hit with the same velocity (ignoring air resistance) if dropped from the same height? Acceleration due to gravity affects heavier objects less, and lighter objects more, therefore it balances out the effect of weight.

At what speed do hailstones fall?

For small hailstones (<1-inch in diameter), the expected fall speed is between 9 and 25 mph. For hailstones that one would typically see in a severe thunderstorm (1-inch to 1.75-inch in diameter), the expected fall speed is between 25 and 40 mph.

How long does it take for hail to hit the ground?

A strong updraft allows hailstones to grow large enough to reach the ground. Simply put, the stronger the updraft, the larger the hail. Once they grow large enough to begin falling, they speed towards the Earth as fast as 90 mph, taking around a minute and a half to reach land!

Why does the projectile not matter when there is no air resistance?

In the absence of air resistance there are no forces or components of forces that act horizontally. In the absence of air resistance the only force acting on a projectile in flight is the weight of the object. Weight by definition acts vertically downwards, hence no horizontal component.

What’s the average speed at which hailstones fall?

However, recent research outside of NSSL using 3-D printed casts of real hailstones suspended in a vertical wind tunnel has repeatedly shown that natural hailstones fall more slowly than solid ice spheres. For small hailstones (<1-inch in diameter), the expected fall speed is between 9 and 25 mph.

Why does hail not grow from the top of a thunderstorm?

Hailstones also do not grow from being lofted to the top of the thunderstorm. At very high altitudes, the air is cold enough (below -40°F) that all liquid water will have frozen into ice, and hailstones need liquid water to grow to an appreciable size. How does hail fall to the ground?

How often do hailstorms occur in the world?

The area where these three states meet – “hail alley” – averages seven to nine hail days per year. Other parts of the world that have damaging hailstorms include China, Russia, India and northern Italy. When viewed from the air, it is evident that hail falls in paths known as hail swaths.

What happens when water freezes in a hailstone?

If the water freezes instantaneously when colliding with the hailstone, cloudy ice will form as air bubbles will be trapped in the newly formed ice. However, if the water freezes slowly, the air bubbles can escape and the new ice will be clear.