Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 119
this air(Fig. 78). Close the tapand try to separate thehemispheres. 1. What evidence have younow that the original air shutup within the hemispheresexerted an outward pressureupon their internal surfaces ? 2. Why was this pressurenot evident at first ? 3. How does decreasing thedensity of a gas… … PROPERTIES AND LAWS OF GASES. Ill pump. (The tube known a3 the Guinea-and-Feather Tubeanswers well.) Stand the tube in a verticalposition, with the open end of the tap in water(Fig. 79). Open the tap. Does the water rise in the tube 1 Take the tube out of the water, screw it tothe air pump and…
Physics
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