Comprising a hollow wooden resonance box, with two meter rules graduated in millimetres, mounted on top on either side along the length.
One each of brass and steel wires of different diameter attached to fixed bridge on one end of the box and tensioned by wrest pins at the other end.
A pulley mounted at the end supports third wire over it with masses suspended to the wire end. Includes two short and two long bridges for adjusting length of vibrating strings, and additional wires one each of steel and brass of 22SWG.
Comprising a hollow wooden resonance box, with two meter rules graduated in millimetres, mounted on top on either side along the length.
One each of brass and steel wires of different diameter attached to fixed bridge on one end of the box and tensioned by wrest pins at the other end.
A pulley mounted at the end supports third wire over it with masses suspended to the wire end. Includes two short and two long bridges for adjusting length of vibrating strings, and additional wires one each of steel and brass of 22SWG.
Mounted on sturdy streamlined base with provision for horizontal or vertical use, fork is manufactured from selected steel. Prong is 10 x 25 x 300 mm. accurate frequency adjustment, vibrations rate 60 per second. Electromagnet can work on 6 Volts. The amplitude of vibration can vary by sliding the electromagnet inside the prongs.
Mounted on sturdy streamlined base with provision for horizontal or vertical use, fork is manufactured from selected steel. Prong is 10 x 25 x 300 mm. accurate frequency adjustment, vibrations rate 60 per second. Electromagnet can work on 6 Volts. The amplitude of vibration can vary by sliding the electromagnet inside the prongs.
On sturdy streamlined base with provision for horizontal or vertical use. Forks is manufactured from selected steel. Prong is 10 x 25 x 300 mm. accurate frequency adjustment, chrome plated, vibrations rate 60 per seconds. Electromagnet can work on 6 volts. The amplitude of vibration can vary by sliding there electromagnet inside prongs. Complete with bench clamp, pulley, and scale pan.
On sturdy streamlined base with provision for horizontal or vertical use. Forks is manufactured from selected steel. Prong is 10 x 25 x 300 mm. accurate frequency adjustment, chrome plated, vibrations rate 60 per seconds. Electromagnet can work on 6 volts. The amplitude of vibration can vary by sliding there electromagnet inside prongs. Complete with bench clamp, pulley, and scale pan.
It comprises two tuning forks each of frequency 426 Hz on two separate resonance boxes. One fork is fitted with adjustable loading mass. When both forks are sounded together, a clearly audible beat is produced. Rate of beats depends on difference in frequencies. This difference can be increased by changing the loading mass.
It comprises two tuning forks each of frequency 426 Hz on two separate resonance boxes. One fork is fitted with adjustable loading mass. When both forks are sounded together, a clearly audible beat is produced. Rate of beats depends on difference in frequencies. This difference can be increased by changing the loading mass.
Three Tuning forks are mounted on three wooden resonance boxes dimensions of which are compatible with frequency of the forks to produce a strong sustained tone. Forks are nickel plated with shanks to screw in the bushes on the top of the boxes. Each set supplied with rubber headed hammer.
Three Tuning forks are mounted on three wooden resonance boxes dimensions of which are compatible with frequency of the forks to produce a strong sustained tone. Forks are nickel plated with shanks to screw in the bushes on the top of the boxes. Each set supplied with rubber headed hammer.
Four tuning forks are mounted on a single proper sized resonance box to produce a major chord. Forks have frequencies of C1 256, E 320 Hz, G 384 Hz and C2 512 Hz. When struck together with hammer, the forks will produce the chord of C major, supplied with one hammer.
Four tuning forks are mounted on a single proper sized resonance box to produce a major chord. Forks have frequencies of C1 256, E 320 Hz, G 384 Hz and C2 512 Hz. When struck together with hammer, the forks will produce the chord of C major, supplied with one hammer.
Nickel-plated, plain shanks, with frequency marked, C (256), D (288), E (320), F (341), G (384), A (426), B (480), C (512). Complete set of EIGHT tuning forks, supplied in case.
Nickel-plated, plain shanks, with frequency marked, C (256), D (288), E (320), F (341), G (384), A (426), B (480), C (512). Complete set of EIGHT tuning forks, supplied in case.
This apparatus is an improvement over the conventional apparatus to show the effects of vibrations in a stretched cord and examine the relationship between frequency, tension and density. A thin steel rod is clamped near one end through two 4 mm socket terminals. This rod passes through the centre of a small solenoid and between the poles of a magnet. Adjustable contact points fitted through a second pair of 4 mm socket terminals make alternating connection with an adjustable contact on the rod. The rod has a small hole at one end for the attachment of thread which passes over a pulley mounted on a bench clamp and supports a scale pan, 75 mm diameter, supplied complete with pulley with clamp and scale pan, 2V A.C. power supply.
This apparatus is an improvement over the conventional apparatus to show the effects of vibrations in a stretched cord and examine the relationship between frequency, tension and density. A thin steel rod is clamped near one end through two 4 mm socket terminals. This rod passes through the centre of a small solenoid and between the poles of a magnet. Adjustable contact points fitted through a second pair of 4 mm socket terminals make alternating connection with an adjustable contact on the rod. The rod has a small hole at one end for the attachment of thread which passes over a pulley mounted on a bench clamp and supports a scale pan, 75 mm diameter, supplied complete with pulley with clamp and scale pan, 2V A.C. power supply.
For demonstration of wave motion, pulses, reflection and interference, steel wire close wound helix, 19 mm diameter closed length 3 meters extending to approximately 9 meters
For demonstration of wave motion, pulses, reflection and interference, steel wire close wound helix, 19 mm diameter closed length 3 meters extending to approximately 9 meters
