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...English chemist, physicist and meteorologist John Dalton that atoms became part of modern science; even in 1900 there were eminent scientists who did not believe that atoms are real. However, between 1900 and 1920 phenomena as varied as the motion of pollen grains in water, diffusion in liquids, radioactivity and the diffraction of X-rays by crystals, all gave similar...

...everyday events or activities; difficulty controlling worry, difficulty relaxing, sleep disturbances, difficulty concentrating, irritability, procrastination. Worry interferes with everyday life. Social anxiety Persistent fear of social or performance situations (e.g. dating, public speaking); intense fear of negative evaluation by others; fear of being humiliated or...

...everyday experience. I am sure you have used scissors, saws, files, chisels or even sandpaper at some time in order to remove unwanted material. These are all mechanical methods where a force is applied through the cutting tool (whether it is the grit in sandpaper or the metal edge of a saw) to the material, and a cut is made on a macroscopic or microscopic scale. Cutting...

...everyday speech, for example ‘education system’ or ‘transport system’. This everyday usage can lead to misunderstanding and conflict because different stakeholders will make different boundary judgements based on their different experiences. This is the same as saying that one person’s education system will be different to another’s. Conflict and confusion...