Physical Laboratory Manual for Secondary Schools

Cover Physical Laboratory Manual for Secondary Schools
Physical Laboratory Manual for Secondary Schools
Silas Ellsworth Coleman
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Through what vertical distance would the barrel be raised ?
e. How much work would have been done if the barrel had been lifted vertically that distance without the aid of any machine?
/. What advantage is derived from the use of the plane ?
Coleman's phy. lab. man. — 6 Digitized by VjOOQ IC V. HEAT EXERCISE 26. EXPANSION* BY HEAT References.— Hoadley, 235-238'; Carhart and Chute, 305-307.
I. To observe and compare the effect of heat on brass and iron.
Apparatus. — Ball and ring of brass ; Buns
...en burner ; jar of water ; compound bar of iron and brass riveted together.
a. To heat either the ball or ring, hold it in the Bunsen flame about a minute ; to cool them, thrust them into the jar of water.
Do not lay the hot ball or ring on the table. Find by trial whether the ball will pass through the ring, — (1) when both are cold ; (2) when the ball is hot and the ring cold ; (3) when both are hot.
State and account for the result in each case.
6. Heat both strips of the compound bar as nearly equally as possible.


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