hedonic
发表于 2025-3-30 09:22:15
Change of State of the water then begins to rise and goes on rising until it reaches 100°C. Heat energy is still being supplied to the beaker from the bunsen burner but the temperature remains steady at 100°C (Fig. 12.1). What is happening to the heat energy being supplied by the bunsen burner when the temperature remains at 100°C?
实施生效
发表于 2025-3-30 15:21:52
Pressureis rather surprising effect? Why do you think drawing pins have sharp points, and knives with sharp blades cut better than knives with blunt blades, ln order to answer these and similar questions, we must try to understand the idea and the meaning of pressure.
暴露他抗议
发表于 2025-3-30 18:08:03
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Magisterial
发表于 2025-3-31 00:34:35
MotionVelocity is the distance travel1ed in unit time in a particular direction, or.A common unit is metres per second, written m/s, in a stated direction.
Glaci冰
发表于 2025-3-31 04:54:08
Levers and Centres of GravityMost of you at some time or other will have used a screwdriver to prize the lid off a paint tin. Does the length of the screwdriver matter? Would the lid of the paint tin come off just as easily if it were prised off using a coin?
chiropractor
发表于 2025-3-31 07:49:14
Heat EnergyIf you laze on a beach in the sunshine you are aware of the heat energy from the Sun falling on your body as you get hotter and hotter! This experience is an example of a basic physical fact; heat energy supplied to a body causes its temperature to rise.
充满装饰
发表于 2025-3-31 10:15:44
Properties of Gases and Molecular StructureMany physical properties of matter can be discussed without regard to how matter is made up. But for a more complete discussion the nature of matter must be considered. The generally accepted theory is that:.The theory enables a wide variety of facts to be linked together, and we begin with the differences between solids, liquids and gases.
gruelling
发表于 2025-3-31 14:41:04
The Transfer of Heat EnergyWe are all familiar with the fact that heat energy can travel from one place to another. We can, for example, on sunny days feel the warmth from the Sun’s rays which have travelled millions of miles across space. In the winter, houses are kept warm by heat energy which travels from fires and radiators to other parts of the buildings.
自负的人
发表于 2025-3-31 18:01:49
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