Students Power Source for Senior Middle School
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Compartment 1:
Inside Pockets:
Two inner pockets; mesh sides with elastic tops, located on the back side of the main compartment.
Large compartment YKK zip closure around three sides of the compartment with a 2 way YKK zip pull. Mesh lining stitched to the base of the bag and a 1mm PVC board reinforcement secured on the base.
Size: H400 x Depth100 x W270 mm.
Compartment 2:
Small pocket H230 x Depth 40 x W280 mm with side gussets, zip closure around top of pocket with one zip pull.
School-in-a-box kit 2016, for 40 students and 1 teacher with 42 components packed in 1 lockable metal box.
It is expected that the materials in this kit are sufficient for 3 months.
The previous School in a Box was reviewed and the contents revised.
Geometry set, students; consisting of 7 items as follows:
1 x protractor: Composed of robust, hard wearing, clear plastic. Dimensions: 10 cm base length and thickness of 2mm.
1 x Compass: Composed of metal with sturdy and durable screw ring and pencil (approximate pencil length: 85mm); the total length of compass (end to end) is approximately 13cm.
1 x Pencil: black lead (core min. 2 mm, max. 3 mm), HB grade, quality wood casing
1 x Triangle (set square): Composed of robust, hard wearing, clear plastic. Angles within the triangle are: 45 degrees, 45 degrees and 90 degrees
1 x ruler: Composed of robust, hard wearing, clear plastic.
Dimensions: approximately 16cm long with 15 cm in calibrated length and thickness of 2mm.
1 x Triangle (set square): Composed of robust, hard wearing, clear plastic. Angles within the triangle are: 30 degrees, 60 degrees and 90 degrees
1 x Wallet: The 6 items are packed in a sturdy plastic wallet, which is resistant to tearing and can be closed.
It is used to understand and differentiate various geometric figures in textbook teaching. It is plastic press forming and consists of cuboid, cube, cylinder, sphere with various shapes and plane figures: rectangle, square, plane quadrilateral, trapezium, triangle and circle.
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It consists of casing, control panel, internal components, and power cord and output electric cable.
1. Frequency range: 450KHz?1620KHz continuously adjustable;
2. Output IF 456KHz error ≤±2%;
3. Output frequency error: ≤±5%;
4. Output amplitude≥300mV, size adjustable, load resistance value≥300Ω;
5. Amplitude modulation factor≥30%.
Low frequency signal:
1. Output amplitude: ≥500mV, size adjustable, load resistance value≥300Ω;
2. Output frequency error: ≤±5%;
3. Output frequency: at 500Hz, 1KHz, 1.5KHz, 2KHz and 2.5KHz;
4. Waveform distortion≤1%, power supply: 220V±10% 50Hz.
This instrument is an adjustable DC stabilized source, with standard voltage: 1.5V-9V six grades, rated output current: 1.5A, voltage stability: each grade less than 350mV, current stability: each grade less than 350mA, ripple voltage: each grade less than 15mV, over-current protection, current limiting in the range of 1.8A~2.4A.
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Dimension (L*W*H CM): 11.2*6*9.5
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Power consumption: 30VA,
Power supply: AC 220V±10% 50Hz±10%
Working Hours: 8 consecutive hours.
The material is polycarbonate with fur, and the length is 300mm. the pointer electroscope can test that it is negatively charged after the friction. It is used for student experiment in group.
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It is used to do experiments: use of oscilloscope, determination of metal electrical resistivity, refitting ammeter into voltmeter, determination of electromotive force of battery and internal resistance of the battery, observing AC rectification and filtered waveform, installing simple radio and measurement of capacitance using capacitor discharge.
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