Conceptual Physical Science, (5th Edition) by Paul G. Hewitt

By Paul G. Hewitt

Conceptual actual technological know-how, 5th version, takes studying actual technological know-how to a brand new point by way of combining Hewitt's top conceptual process with a pleasant writing sort, robust integration of the sciences, extra quantitative assurance, and a wealth of media assets to aid professors in school, and scholars out of sophistication. It presents a conceptual assessment of simple, crucial themes in physics, chemistry, earth technological know-how, and astronomy with not obligatory quantitative assurance.

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Extra resources for Conceptual Physical Science, (5th Edition)

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We say they undergo acceleration. The first to clearly formulate the concept of acceleration was Galileo, who developed the concept in his experiments with inclined planes. He found that balls rolling down inclines rolled faster and faster. Their velocity changed as they rolled. Further, the balls gained the same amount of velocity in equal time intervals. 21 INTERACTIVE FIGURE A ball gains the same amount of speed in equal intervals of time. It undergoes constant acceleration. Galileo defined the rate of change of velocity as acceleration:* Acceleration = change of velocity time interval Acceleration is experienced when you’re in a moving car or bus.

Cience and technology are also different from each other. Science is concerned with gathering knowledge and organizing it. Technology lets humans use that knowledge for practical purposes, and it provides the instruments scientists need to conduct their investigations. Technology is a double-edged sword. It can be both helpful and harmful. We have the technology, for example, to extract fossil fuels from the ground and then burn the fossil fuels to produce energy. Energy production from fossil fuels has benefited society in countless ways.

That is why we begin with physics, then follow with chemistry, then investigate Earth science, and conclude with astronomy. All are treated conceptually, with the twin goals of enjoyment and understanding. In Perspective Who gets the most out of something: one with understanding of it or one without understanding? EXPLAIN THIS J ust as you can’t enjoy a ball game, computer game, or party game until you know its rules, so it is with nature. Because science helps us learn the rules of nature, it also helps us appreciate nature.

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