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A serviceable spring balance
The quality of rubber deteriorates rather rapidly in unfavourable climatic conditions; a coiled steel spring is preferable. The pattern defined has been found satisfactory. The coil is protected from injure by enclosing it in a tube.
The reading is made at the bottom of the tribe on a graduated wooden plunger. First wind the spring attach it by a screw eye to a piece of dowelling which will fit into the tube selected (bamboo or plastic).Fasten the other end of the spring by a wire staple to a wooden stick which will glide in the tube. Fix the dowelling to the top of the tube and put in into it a hook for suspending the balance. Screw one more hook into the wooden plunger which can now be graduated.
A centrifugal fan is used to pump air. The fan rotor is 1 ft in diameter, and the blade spacing is 2 in. The air enters with no angular momentum and exits radially with respect to
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A radioactive substance has a half life of 1 min. If one nuclei decays now , when will be next decay????
Question: The external surface of a short vertical segment of plastic pipe is hidden from view by wire wrapped around the pipe. Current flows clockwise as out looked from above
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Action and reaction in polling forces Secure two spring balances. Make a loop in every end of a short piece of strong cord. Join a spring balance to each end and have two pupil
how to reduce friction?
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