in case of 1 why will it be mistake to think that the roof will carry most of weight of the cylinder
is it a misconception of pressure ?
Atmospheric pressure is the force per unit area exerted by the weight of the Earth's atmosphere. It is caused by the weight of the air molecules above a given point on Earth's surface.
Atmospheric pressure is typically measured using a barometer, which measures the height of a column of mercury or aneroid barometer. It is usually reported in units of millibars (mb) or inches of mercury (inHg).
Atmospheric pressure can be affected by changes in altitude, temperature, humidity, and air density. It is also influenced by weather patterns such as high and low pressure systems.
The average atmospheric pressure at sea level is approximately 1013.25 millibars or 29.92 inches of mercury. This is also known as standard atmospheric pressure.
Atmospheric pressure plays a crucial role in the formation of weather patterns and climate. High pressure systems typically bring clear and dry weather, while low pressure systems are associated with cloudy and wet conditions. Changes in atmospheric pressure can also affect wind patterns and ocean currents, which in turn can impact global climate patterns.