An overhead projector is required to display content on transparencies. A transparency is a thin sheet of plastic in which light is reflected upon to display content.The light source emits light towards the transparency and then the image is displayed on the wall. Usually, this light source comes from below and lights upward and so the content is depicted above or overhead.
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Algorithms is formula for solving a problem. It is helpful because it specifically give instructions detail to computer to what a computer should perform a specific task.
For e.g. calculating report cards.
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A flight that does not reach space is still sometimes called suborbital, but is not a 'suborbital spaceflight'. Usually a rocket is used, but experimental sub-orbital spaceflight has also been achieved with a space gun.
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