Why is there lower pressure at the equator?
Equatorial regions is hotter and the air above expands, becomes less dense and rises. This produces a low pressure belt at this latitude.
What is the result of horizontal differences in air pressure?
Wind is the result of horizontal differences in atmospheric pressure. Atmospheric (air) pressure is the force exerted against a surface by continuous collision of gas molecules. Air pressure is measured in millibars. Warm, dry air has higher pressure than equally warm, moist air.
How fast is a 50 caliber bullet in mph?
.50 BMG
| Bullet mass/type | Velocity | Energy |
|---|---|---|
| 655 gr (42 g) ADI | 3,029 ft/s (923 m/s) | 13,350 ft⋅lbf (18,100 J) |
| 700 gr (45 g) Barnes | 2,978 ft/s (908 m/s) | 13,971 ft⋅lbf (18,942 J) |
| 750 gr (49 g) Hornady | 2,820 ft/s (860 m/s) | 13,241 ft⋅lbf (17,952 J) |
| 800 gr (52 g) Barnes | 2,895 ft/s (882 m/s) | 14,895 ft⋅lbf (20,195 J) |
How fast does a 9mm bullet travel?
102 miles per hour
How far will a 9mm travel underwater?
According to the makers, it not only has a range of up to 100 feet underwater, it can also be used to fire from the air into the water. The weapon could be used to shoot at divers or swimmers from a boat, for example – or even fire from underwater into the air.
How fast is a bullet underwater?
From my model, this terminal speed would be just 0.014 m/s and the program calculates a final speed of 0.017 m/s – so pretty close. If I look at the data from the underwater video, it looks like the bullet has a final speed of 18 m/s.
Do bullets ricochet off water?
Bullets are more likely to ricochet off flat, hard surfaces such as concrete, rock or steel, but a ricochet can occur from irregular surfaces within heterogeneous materials including soil and vegetation. Though it may not be intuitive, bullets easily ricochet off water; compare stone skipping.
What angle do bullets ricochet off water?
The critical ricochet angles were ranging from 15 to 30°. The average ricochet angles for all projectiles were pretty close for all projectiles at 2.5 and 10° incident angles for the range of velocities studied.
At what angle does a bullet ricochet?
The estimates of the critical ricochet angles varied between cartridge types and were 21.0° for . 32 Auto FMJ bullets, 15.8° for 9 mm Luger FMJ bullets, 17.6° for . 45 Auto FMJ bullets, and 21.3° for 9 mm Luger, Action NP bullets.
What is ricochet effect?
The ricochet effect is defined as a reflection of our willingness to show up to help others, which results in negative circumstances for ourselves.
What type of bullets ricochet in the body?
A ricocheted hollow-point bullet, in particular, may overpenetrate the tissue when the bullet nose is deformed or fails to enter the body in a nose-forward orientation. Similarly, internal ricochet may occur when a bullet strikes hard tissue.
How does hollow-point bullets work?
When a hollow-point hunting bullet strikes a soft target, the pressure created in the pit forces the material (usually lead) around the inside edge to expand outwards, increasing the axial diameter of the projectile as it passes through.
Why can’t the military use hollow points?
A Hollow Point round is designed to increase in size and increase the damage done to the person hit. The Hague Convention of 1899, Declaration III, prohibited the use in international warfare of bullets that easily expand or flatten in the body. One good reason is that a hollow point is a usually a good body stopper.