Magdebug Hemispheres with Stand
Employs Guerick's Method for demonstrating the force of atmospheric pressure
Two plastic 10cm-diameter hemispheres, each with a sturdy handy, make up this device. One hemisphere has a gasket seal; the other has a stopcock for attaching to 0.8-1.2cm inner-diameter vacuum tubing. Join the hemispheres, hook them up to a hand pump, aspirator, or vacuum pump, and evacuate them. Students will find it hard, if not impossible, to pull them apart. Open the stopcock to let air in, and the hemispheres separate easily. A convenient metal stand and operating instructions are included.
馬德堡壓力球
此裝置是包含兩個直徑10公分的朔膠半圓球。一半圓為封死的,一半
圓有一連接直徑0.8到1.2公分的抽真空橡皮管。將兩半圓相接合,連
接一手用幫浦並抽出空氣,會發現要拉開此兩半圓是很困難的。但將
空氣由幫浦中流入時,又很輕易即可將兩半圓拉開。附有說明書和方
便的金屬把手。