What is air pressure?

The

air pressure basically refers to the volume of air in a specific environment, with larger volumes creating higher pressures. For example, on the Earth's surface, it is known as "atmospheric pressure" and refers to the weight of the Earth's atmosphere pushing to everything. Pressure changes can affect temperature, weather patterns and cause physiological problems for humans and animals. This pressure can even affect the performance of basketball or similarly inflated object.

atmospheric pressure

on the ground is the average air pressure at the sea level of 1.03 kilograms per square centimeter (kg/cm ^{2 ) or £ 14.7 per square inch (dogs); This is commonly measured in bars with an atmospheric pressure of about 1 bar. This means that hundreds of pounds of pressure always push all from all sides. People and other animals are able to survive this pressure because their bodies have evolved on a surface where it is natural. Lithuania increases or decreases, it may result in discomfort or even death.}

Pressure and weather changes

Atmospheric pressure varies slightly above the Earth's surface, and for different types of weather, pressure changes are responsible. Low -pressure systems are associated with storms, tornadoes and hurricanes. Sometimes the air pressure on the sea level can drop up to 870 millibars, which is about 85% of the average air pressure. This only happens during the most serious storms. Changes in pressure on the Earth's surface cause the wind: how high pressure air moves towards low pressure areas and creates impacts.

different pressures at different altitudes

on top of Mt. Everest, the highest mountain on the ground, is only about a third of what is on the sea level. People at high altitudes often experience discomfort, such as cracking ears because of the difference in their inner and external pressures. At 16 kilometers (km) or almost 10 miles above the surface, slightly higher than the travel altitude typical insert is the pressure afterUze 1/10 that is on the sea level. Because low air pressure can be very unpleasant for humans, due to low oxygen content, all areas of aircraft containing passengers are artificially under pressure. In the case of bursting in the fuselage of the aircraft, unsecured objects can be "vacuumed" from the vessel, as the high -pressure air in it plunges into a low -pressure environment outside.

Higher altitude and universe

at 31 km or about 19 miles above the earth's surface, in the stratosphere there is only 1/100 air pressure, which is on the sea level. From this level, the atmosphere quickly deteriorates into nothingness. Above 100 km or just over 62 miles above the surface, international definition for the universe, pressure is approaching zero and almost becomes a vacuum. People in such a low -pressure environment cannot be unprotected.

Another use for pressure

Air pressure is used in a number of commercial applications and consumer products. Pressure air can be used in a hydraulic machine that uses air expansion to move different parts. AerOsol canisters use pressure air to spray different chemicals because high pressure naturally plunges into lower atmospheric pressure when used. Basketball and similar objects, as tires, are inflated to bounce or support other objects. Under inflation, they can leave them weakened or less efficient, while excessive pressure can cause it to break or easier rupture during use.

High -pressure settings

Under the sea level on the ground, the pressure is increasing. For example, under the ocean, high pressure in the water can crush a person or an object that is designed to withstand the atmospheric pressure of the planet. Special suits and vehicles are needed to withstand such high pressures.