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...attention on one region of space, such as that between the pair of arrows in Figure 10(a), and observing what happens as time passes rather than at one instant of time. The graph in Figure 10(b) shows the variations of pressure in this region as the wave goes by. It has the familiar sinusoidal shape, but the pressure is shown as a variation with time instead of with...

...attention to a screen or use of a keyboard and mouse lead to problems?...Software and the law: 6.7 Best practice in health-and-safety regulations - Physical problems such as RSI (repetitive strain injury) have been attributed to prolonged computer use. Concerned about this, the European Union decided to act to require employers to follow best industrial practice. In May...

...Attention was also drawn to the Pluto–Charon system (which had not yet been visited when the video was made). Pluto is a dwarf planet made of ice. It is no longer counted as a true planet, but as one of the largest and nearest Kuiper Belt objects. Its major moon, Charon, has a diameter that is slightly more than half that of Pluto. Pluto and Charon are so close to each...

...attention to alpha not equals zero . Then multiline equation row 1 f super prime of alpha equals lim over z right arrow alpha of f of z minus f of alpha divided by z minus alpha row 2 Blank equals lim over z right arrow alpha of left parenthesis one solidus z right parenthesis minus left parenthesis one solidus alpha right parenthesis divided by z minus alpha row 3 Blank...