科学。(国外英文资料).docVIP

科学。(国外英文资料) Subject: Physics Teaching content: atmospheric pressure [objectives of this chapter] This chapter begins with the famous experiment on hemispheric hemispheres, revealing the miraculous forces of atmospheric pressure and pressure; measuring the magnitude of atmospheric pressure by means of the Tori demolition experiment; and introducing an instrument for measuring atmospheric pressure This chapter materials based on Determination of atmospheric pressure, make scientific explanation to the production practice, people living in the phenomenon, like boiling point and pressure of water, the working principle of piston type pumps and pump, pump, pump, working relationship between the air compressor and the atmospheric pressure, atmospheric pressure human life and relationships. [basic knowledge] 1. understand the phenomenon of atmospheric pressure (1) because the air is acted by gravity and can flow, the interior of the air has pressure in all directions (2) the pressure of the atmosphere on objects immersed in it is called atmospheric pressure, referred to as atmospheric pressure or atmospheric pressure (3) the experiment on the hemispheric hemispheres of the fort not only shows the existence of atmospheric pressure, but also the great atmospheric pressure (4) Tori and the measure of the atmospheric pressure value: Tori is the important experimental determination of demolition of the atmospheric pressure. The mercury pressure generated inside the glass tube only with height of the mercury column, and mercury, the thickness of glass tube is vertical or inclined tube and tube surface of mercury the distance from the top are irrelevant. This conclusion can be drawn by the liquid pressure formula. Thus, the Tori split pipe pressure determination, as long as the tube of mercury above the vacuum, atmospheric pressure is equal to pipe water pressure relative to the mercury silver surface height difference of the decision. [key and difficult analysis] The cause of t