Physics accessories

It is undoubtedly very useful, educationally speaking, if students can measure mass with a beam balance and a set of weights. However, such equipment may not always be available or there may be too little time for this kind of measuring technique. In such instances, what better alternative than to opt for one of the two inexpensive, versatile and easy-to-use miniature electronic scales, the CB 501 and CB 1001?

Two powerful 1.5 V AA batteries are included with the scales.

Features and functions

• Brightly backlit LCD with digits 12 mm high
• Large, easily cleaned stainless steel pans, diam. 130 mm
• Lightweight, easy to use design
• Sealed keyboard
• Spirit level and height-adjustable feet
• Calibration function
• Automatic shut-off
• Battery display to indicate when batteries need to be replaced
• Resolution: 0,1 g
• Accuracy: 0,1 g
• Range of measurement: 500 g (CB 501) / 1000 g (CB 1001)
• Dimensions: 210 x 160 x 65 mm
• Weight: 385 g

With its electronic sensor-based weighing technology, the PRECISION 500 is capable of weighing out substances in quantities of up to 500 g with a precision of 0.1 g. The scale has a tare function and automatically switches off after 60 seconds. One AA battery is included.

• Dimensions (closed): 127 x 87 x 21 mm
• Weighing dish: 63 x 41 mm
• Weight: 114 g

The black anodised aluminium profile rail can be used for a variety of purposes. It is used as a track for motion experiments and as an optical bench for experiments on imaging and diffraction. It can also be used as an inclined plane, as a track for friction experiments and as a stand for experiments in MECHANICS and ENERGY. The millimetre scale is screen-printed in scratchproof white ink and allows for highly accurate experiment results. The zero point is about 15 cm from the end to make the equations for optical imaging and motion easier to derive. In the OPTICS sets, the object to be imaged is directly above the “0” mark and in the MECHANICS sets, the first light barrier is set up at the same point.

• Length: 1000 mm
• Weight: 1750 g

The universal tracks can be stored practically in a cupboard stacked lengthways on a shelf or, in order to save space, can be suspended from a wall mounting. The mounting consists of an aluminium rail, 50 cm long with 5 supports each capable of carrying 5 universal tracks.

Inside the perspex tube there are 50 steel balls, the potential energy of which can be converted into internal energy by repeatedly letting them drop the length of the tube onto its ends. The measurement is carried out using a thermal sensor, which can be introduced into the inside of the tube.

• Length: 950 mm
• Diameter: 30 mm

Sound tubes

For the experiments in ACOUSTICS 2, in particular experiments on sonic radar and determining the velocity of sound in air, two tubes of differing lengths but the same diameter are needed.

• Lengths: 630 and 730 mm
• Diameter: 47 mm