CPM Physics Mechanics

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To illustrate that a body impelled horizontally will fall vertically at the same rate as a similar body allowed to fall freely. Consists of a push button activated spring loaded launcher with holes for locating two 19mm dia steel spheres which act as projectiles. The launcher projects one sphere forward and allows the other to fall freely. Mounted on a wooden block 180 x 60 x 30mm.

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To demonstrate that the pressure in a liquid is transmitted equally in all directions. Made of borosilicate glass.

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To demonstrate the transmission of pressure by a liquid, the compressibility of gases and Archimedes Principle.

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Four glass capillary tubes of various bores, 150mm long and a water reservoir are mounted on a sturdy base. It demonstrates that capillary rise is dependant on the internal diameter of the tube.

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Set of four borosilicate glass tubes of different shapes to demonstrate that the liquid will rise to the same level in all. Mounted on a sturdy base.

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To demonstrate resolution of forces, acceleration down a plane, work, potential energy and friction. Hardwood base 600 x 100mm fitted with a pulley at one end and hinged to a wooden polished base 450 x 100mm at the other. The plane can be fixed at any height or at any angle up to 45 degrees by clamping the wing nut. Complete with aluminum-graduated arc, cylindrical plated metal roller, 2 wooden blocks 200 x 75mm and 100 x 75mm (L x W), a steel block 100 x 75mm (L x W) and a scale pan 75mm dia with cord and hook. A mass set, sold separately, is required. 

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Illustrates the inertia of an object. Consists of a base supporting a vertical support having a concave top.  A card is placed on top of the support and a ball is placed on top of the card. A spring fastened to the base is snapped causing the card to slide from under the ball. The ball remains at rest atop the support.

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Operates on 12V. The timer employs an electromagnet, with spring-loaded armature which vibrates above a support table for a carbon paper disc. Paper tape, drawn through guides on the table, is stuck by a dotting-screw carried on the armature. The peg on the support table is movable to allow maximum use of carbon paper discs.

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For hanging three pendulums together, used in pendulum studies. Clamp is made of steel, complete with clamp for fastening to a support rod of upto 19mm dia. Has three separate pendulum positions and each can be adjusted individually.

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Consisting of Aluminum, Brass, Copper, Lead and Zinc cylinders. Dia 15mm and Mass 100gm approx.

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To demonstrate the principle of Archimedes' that a body immersed in water loses weight equal to its own volume of water. Consists of a metal cylinder and a close fitting metal bucket, whose volumes are equal.

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Made from borosilicate glass with capillary stopper.

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To get precise readings over a wide range of pressure. The apparatus consists of a glass tube with stopcock and a glass tube with a funnel top, located at opposite ends and connected with rubber tubing. The glass tubes are mounted on a sliding bracket and can be adjusted for height on a 2-rod frame fixed on a wooden board. The tubes are mounted against a meter stick graduated 0-100cm x 1mm. The apparatus is mounted on a cast iron, enamel finished base. Mercury not included.

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Made of rigid colored plastic with deep V-grooves.  Balanced for free movement.  Pulleys are about 50mm in diameter and are mounted in parallel mode on aluminum strips with a hook at each end.

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Aluminum pulleys of 50mm diameter mounted in parallel in a metal frame with a hook at each end.

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Heavy cast table clamp for supporting a pulley with rod combination, having arrangement for adjustable height. The clamp can be fixed to table edges up to 45mm thickness.

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Static and sliding frictional forces between different surfaces can be compared and contrasted using this set of three blocks. Factors, which might change the frictional force such as weight, surface area or angle of incline, can also be explored. This set consists of one wooden block with smooth surface and a hook, one wooden block with a mirror surface and corresponding eye and a glass mirror with sandpaper affixed to one side.

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Made of plated steel, it has knife-edge bearings for over or under support and knurled tightening screws. Fits standard meter sticks for use with demonstration balance.

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Demonstrates that the extension of a coiled spring is proportional to the weight of the masses loaded on its hanger. It consists of a 15cm adjustable mirror scale, to prevent parallax error, graduated in millimeters, and mounted on a sturdy 30cm support rod and base. A hook supporting a coiled spring with a 50gm brass hanger and indicator is attached to the rod. Requires slotted weights, available separately. 

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Smooth hardwood geometric figures packed in a box are available in a 16-piece set. Used to illustrate cones, spheres, cubes, cylinders, pyramids, prisms, hemispheres and others.

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A lead cone with a hook on top is shaped in a way that makes it difficult to calculate the volume. It can only be calculated by completing the experiment instead of using the calculator. Mass 125gm approx.

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Spirit level mounted in two rectangular cast iron frames with one end resting on point of micrometer screw, fitted in one frame, the second end of spirit level pivoted in the second frame. The micrometer is provided with vertical scale 5mm on either side of the zero and Vernier reading 0.01mm, complete with ceiling bracket having two self centering chucks and tension weight. The apparatus has black stove-enamel finish.

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To demonstrate Bernoulli’s Law. A glass tube of 18mm (3/4 inch) dia and 180mm(7 inch) long.  The tube is constricted at the center and has three vertical outlet tubes to measure the pressure at both ends and in the middle. The ends are flared.

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Mercury barometer made of brass with plated and painted finish, mounted on a polished wooden base, mercury thermometer 10 to 50 x 1C. Barometer is suitable for altitude upto 600meters. The dual scale reads 640 to 800mm, 25 to 32 inches, divided in 1mm and 0.05 inches respectively, Vernier reading 0.05mm and 0.002inches provided with adjustable knob. The barometer tube, cistern and scale covering glass are of borosilicate glass. Supplied without mercury.

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Aluminum pulleys of 50mm, 37mm and 25mm dia mounted in a metal frame with a hook at each end.

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Plastic pulley, 50mm dia, mounted horizontally on a C type aluminum frame with a thumbscrew for clamping to surfaces upto 35mm thick.

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With three way attachment. A light alloy pulley 70mm dia on brass bearing held in enamel finish alloy bracket with two clamping screws for bench and rod support respectively. The bracket may be clamped to a bench edge or a similar support up to 38mm thick, screwed to a flat surface or held on a 13mm dia support rod.

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An aluminum cylinder 75 x 25mm (H x D) with squared ends and a hook mounted on one of them. Can be used for determining the specific gravity of aluminum.

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Brass plate, 200mm dia, with stopcock and metal tripod base

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To observe transmission and multiplication of forces. Made from borosilicate stand.

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Working model for demonstrating the operation of a lift pump. Made from borosilicate glass.