Model No:PY-176
Mechanical Equivalant Of Heat By Searle’s Friction Cone Apparatus
1. Friction cone apparatus with revolution counter and rotational disc and rotational handle. It consists of two metal cones A and B which fit closely one into the other. The two cones are held in a metal box, lined with cork to prevent the loss of heat. PULLY The outer cone A 5 fixed at the bottom to a spindle which can be rotated by means of a hand wheel. The number of revolutions are recorded by counter. Due to the rotation of the outer cone A, the inner cone B tends to rotate but the rotation is prevented by applying a suitable external force M g. This is done by means of a wooden disc Dfitted to the upper end of the inner cone. This disc is kept stationary by applying a tangential force, exerted by a string which passes over a frictionless - pulley. The disc D has a hole in its centre through which a thermometer T can be . introduced inside the inner cone to note the temperature of liquid (water) contained in it
2. Thermometer, 110 C mercury to measure the temperature
3. Digital Balance (no Need Of Weight Box
4 Stop Watch digital
