Question

(1) What is the atmospheric pressure? How can you measure it?​

Answer 1

ᴛʜᴀᴛ ᴘʀᴇssᴜʀᴇ ɪs ᴄᴀʟʟᴇᴅ ᴀᴛᴍᴏsᴘʜᴇʀɪᴄ ᴘʀᴇssᴜʀᴇ, ᴏʀ ᴀɪʀ ᴘʀᴇssᴜʀᴇ. ɪᴛ ɪs ᴛʜᴇ ғᴏʀᴄᴇ ᴇxᴇʀᴛᴇᴅ ᴏɴ ᴀ sᴜʀғᴀᴄᴇ ʙʏ ᴛʜᴇ ᴀɪʀ ᴀʙᴏᴠᴇ ɪᴛ ᴀs ɢʀᴀᴠɪᴛʏ ᴘᴜʟʟs ɪᴛ ᴛᴏ ᴇᴀʀᴛʜ. ᴀᴛᴍᴏsᴘʜᴇʀɪᴄ ᴘʀᴇssᴜʀᴇ ɪs ᴄᴏᴍᴍᴏɴʟʏ ᴍᴇᴀsᴜʀᴇᴅ ᴡɪᴛʜ ᴀ ʙᴀʀᴏᴍᴇᴛᴇʀ. ɪɴ ᴀ ʙᴀʀᴏᴍᴇᴛᴇʀ, ᴀ ᴄᴏʟᴜᴍɴ ᴏғ ᴍᴇʀᴄᴜʀʏ ɪɴ ᴀ ɢʟᴀss ᴛᴜʙᴇ ʀɪsᴇs ᴏʀ ғᴀʟʟs ᴀs ᴛʜᴇ ᴡᴇɪɢʜᴛ ᴏғ ᴛʜᴇ ᴀᴛᴍᴏsᴘʜᴇʀᴇ ᴄʜᴀɴɢᴇs.

Answer 2

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That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. In a barometer, a column of mercury in a glass tube rises or falls as the weight of the atmosphere changes.

Explanation:

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