Large digital countdown timer with range up to 99 minutes and 59 seconds, with resolution of 1 second.
Comes with stand, clip and magnetic fixing.
Countdown only. 
LCD Size: 64 x 38mm. 
Size: 80 x 70 x 20mm. 

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The apparatus includes the plastic box with sound source that runs on 9 Volt batteries (not included). 
With new addition, you can hear the doppler effect with this very useful and simple demonstration. 
A strong string is supplied for rotation.

Technical Specifications :
Length (cm): 13
Height (cm): 8
Width (cm): 9

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Designed to suit curriculum based experiments for the topics of Force & Motion. 
The carefully designed and matched components provide an excellent medium for demonstrating these important principles. 

The unit comprises: 
Aluminium Track, 1.2m
2 high-impact moulded trolleys (1 spring loaded)
10 x 10g masses
1 x ticker tape timer
1 trolley weight
20 x carbon discs.

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Made from rigid ABS plastic, these trolleys have accurately-aligned, very low friction wheels. 
The two-position firing pins have a locking catch for safety and the trolleys have velcro pads for inelastic collision experiments. 
The trolleys are stackable and can withstand loads up to 60kg. 
Coupled with their low profile and accurate mass of 600g, this allows a range of kinematic experiments to yield high quality data. 
Dimensions: 310mm (L) x 130mm (W) x 90mm (H).

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Material: Wooden
Length: 300mm
A pair of 300mm long wooden trolleys, mounted on three wheels. 
A spring loaded rod is fitted to give impulse when released.

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The adjustable 5KV output is fully isolated and the output is monitored by a digital display. 
Output current is electronically limited to 2mA and the outputs are also current limited by 100K resistors to avoid larger transient currents. 
The switching transformer is specially wound so that the output maintains a stable voltage with time, as opposed to most other commercial brands where the voltage will drop with time. 
An auxiliary output is provided to drive cathode heaters etc. 
An Independent earth terminal is available for earthing of any one of the five output sockets.
In addition to the 0-5KV outputs, there are further outputs linked by 25M? resistors. 
This provides EHT outputs appropriate for electrostatic experiments with a short circuit current of 60µA.
Continuously variable, 0-2.5KV or 0-5KV at a maximum current of 2mA. 
Two secondary outputs with 25M?resistors (total 50M for 5KV range). 
Auxiliary output, 6.3V a.c. at 1A, protected by resettable fuse. 
Bright 12.5mm green LED display indicating EHT output. 
EHT power supply suitable for driving Teltron tubes and electrostatic experiments. 
Shrouded sockets suitable for standard 4mm plugs or shrouded plugs.

Technical Specifications :
Input: 220V-240V, 50/60 Hz
Output: 0 to 5KV DC, 2mA or 2.5KV DC, 2 mA
Mains supply: 230V 5%, 50Hz
Fuse: 315mA (L)
Secondary outputs with 25M? safety resistors.
Auxiliary output of 6.3V AC, 1A for cathode heaters, protected by resettable fuse
Independent Earth Terminal for earthing of any one of the five output sockets.
Dimensions: 208 x 155 x 115mm (W x H x D).
Height including handle is 187mm.

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Foils, Pack of 5
Plastic strip with 4mm socket terminals and two crocodile clips to hold electrode rods and foils in place during use.

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Rods, Pack of 5.
Plastic strip with 4mm socket terminals and two crocodile clips to hold electrode rods and foils in place during use.

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