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Some types of modern technology have affected how people communicate with one another. Cell phones, the Internet, and email are some examples. Choose a type of technology that has changed how people communicate. Then research and write about the history of its invention, how it has developed over time, and how it is used today. Be sure to include evidence from at least two research sources in your paper....
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The cuddly domesticated house cats we love so much today are in fact descendants of lions and tigers, who are successors of early carnivores known as miacids. From here modern wild cats evolved into three key species – the European wild cat, the African wild cat and the Asiatic desert cat.
Frogs and toads have a lot in common. They are both amphibians in the order Anura, which means “without a tail.” Toads are a sub-classification of frogs, meaning that all toads are frogs, but not all frogs are toads. They both reproduce in water, and they even look alike.
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I didnt have any other idea's so I chose cat's and lion's and frog's and toad's I hope this helps!! :)
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The illusion of motion pictures is based on the optical phenomena known as persistence of vision and the phi phenomenon. The first of these causes the brain to retain images cast upon the retina of the eye for a fraction of a second beyond their disappearance from the field of sight, while the latter creates apparent movement between images when they succeed one another rapidly. Together these phenomena permit the succession of still frames on a motion-picture film strip to represent continuous movement when projected at the proper speed (traditionally 16 frames per second for silent films and 24 frames per second for sound films). Before the invention of photography, a variety of optical toys exploited this effect by mounting successive phase drawings of things in motion on the face of a twirling disk (the phenakistoscope, c. 1832) or inside a rotating drum (the zoetrope, c. 1834). Then, in 1839, Louis-Jacques-Mandé Daguerre, a French painter, perfected the positive photographic process known as daguerreotypy, and that same year the English scientist William Henry Fox Talbot successfully demonstrated a negative photographic process that theoretically allowed unlimited positive prints to be produced from each negative. As photography was innovated and refined over the next few decades, it became possible to replace the phase drawings in the early optical toys and devices with individually posed phase photographs, a practice that was widely and popularly carried out.
There would be no true motion pictures, however, until live action could be photographed spontaneously and simultaneously. This required a reduction in exposure time from the hour or so necessary for the pioneer photographic processes to the one-hundredth (and, ultimately, one-thousandth) of a second achieved in 1870. It also required the development of the technology of series photography by the British American photographer Eadweard Muybridge between 1872 and 1877. During that time, Muybridge was employed by Gov. Leland Stanford of California, a zealous racehorse breeder, to prove that at some point in its gallop a running horse lifts all four hooves off the ground at once. Conventions of 19th-century illustration suggested otherwise, and the movement itself occurred too rapidly for perception by the naked eye, so Muybridge experimented with multiple cameras to take successive photographs of horses in motion. Finally, in 1877, he set up a battery of 12 cameras along a Sacramento racecourse with wires stretched across the track to operate their shutters. As a horse strode down the track, its hooves tripped each shutter individually to expose a successive photograph of the gallop, confirming Stanford’s belief. When Muybridge later mounted these images on a rotating disk and projected them on a screen through a magic lantern, they produced a “moving picture” of the horse at full gallop as it had actually occurred in life.
An obtuse is a shape that has a size of more than 91% degrees.
An Isosceles is a shape that has two sides of equal length and one odd length.
A is not it because it has all different sizes
B is not it because it has a 90 degrees angle.
C is not it because it has a 90 degrees angle
D is correct
