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Major delections:
1. rotational dynamics
2. grating spectrometer
3. shunts and multipliers for electrical meters
4. electronics
5. solid structures
6. features of CRO
Major additions:
1. friction
2. moment of a force
3. centre of gravity
4. the equation of 1/u + 1/v = 1/f
5. the relationships of the pressure , volume and temperature of a gas