Mosquito
发表于 2025-3-21 19:38:53
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frugal
发表于 2025-3-21 23:55:56
Introduction,ritten to help you revise and prepare for an examination and assumes that you have completed a GCSE course. If there are topics that you have never studied, refer to a good textbook and carefully read and make notes on the relevant chapter. One good, concise and easy-to-read text for this purpose is . published by Macmillan Education.
Dawdle
发表于 2025-3-22 02:25:56
Electrostatics, Electron Beams and Radioactivity,with wool becomes positively charged. Like charges attract and unlike charges repel. Charge may be detected using a gold leaf electroscope (see Example 14.5). If the leaf of a charged electroscope diverges further when a body is brought up to it, that body is charged. The sign of the charge on the body is the same as that on the electroscope.
煞费苦心
发表于 2025-3-22 08:02:00
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Entirety
发表于 2025-3-22 11:05:03
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欢呼
发表于 2025-3-22 13:18:35
,SI Units, Density, Pressure and Hooke’s Law,Some base units of the SI system (Système International) are shown in table 2.1.
Hiatus
发表于 2025-3-22 21:07:59
Moments, Equilibrium, Work, Energy, Power and Machines,When a body is in equilibrium, the sum of the clockwise moments about a point is equal to the sum of the anticlockwise moments about the same point. In Fig. . a beam is balanced at its centre point. Using the measurements shown in the diagram
Deadpan
发表于 2025-3-22 22:30:29
,Archimedes’ Principle and Flotation,When a body is completely or partially immersed in a fluid, the upthrust on it is equal to the weight of fluid displaced.
Wordlist
发表于 2025-3-23 01:52:05
Expansion, Gas Laws, Thermometers, Kinetic Theory and Molecular Size,Gases, solids and liquids usually expand when heated. For a given temperature rise, gases expand more than liquids and liquids expand more than solids. Water has the unusual property of contracting as it is heated from 0°C to 4°C; it has its maximum density at 4°C (see Example 6.12).
Wallow
发表于 2025-3-23 06:08:48
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