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Book Chapter |
This first chapter deals with one of the most basic principles of motion, which happens to be known as Newton’s first law. Not coincidentally, it has something to do with Isaac Newton. It’s a nice law to start out with…
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Book Chapter |
If you understood the first two chapters, you now know how to describe motion (using velocity and accelerations) and you know what causes changes in motion (net forces do it). Remember that net force refers to what you…
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In order to get a more complete understanding of how and why things move the way they do, it is necessary to consult with Newton one more time. Newton's Third Law, which sums up this idea of objects pushing on each…
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Round and Round and Round in the Circle Game
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If you recognize where the title of this chapter came from, then you're showing your age and your taste for FM music in the old days. For the record (and it was a record), it comes from a song written by Joni Mitchell…
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Energy is such a common notion. We talk about it all the time. Should you buy energy-efficient windows? The country needs an energy policy. That little kid at the store who screaming at the top of his lungs sure…
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Book Chapter |
Up until now, we've been talking about things having a certain amount of energy and not about things gaining, losing, or changing their form of energy. We've already seen how energy can change, though. A marble at…
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It Slices, It Dices--It Gathers Dust!
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In case you can't tell from the title, this chapter is about machines. No, not salad shooters and makers of julienne fries but rather everyday things such as scissors and bottle openers and car jacks. These are known…
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Temp-a-chur and Thermal Energy
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In this chapter you will learn the basic concept of temperature and what it means for one thing to be hotter than another. The hotter something is, the faster its molecules are moving. And that means that a hot…
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Close the Door--You're Letting the Cold In!
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Actually no, you aren't letting the cold in when you leave the door open in winter. That's a common misconception that will be gently put to rest in this chapter. There will, however, be a discussion of the tranfer…
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Book Chapter |
Energy transformations take place all over the Earth without humans ever getting involved. Being the control freaks that we are, though, we spend a lot of time trying to direct those energy transformations to make our…
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Book Chapter |
This book starts with a rather simplistic view of what light is. This chapter starts with a simple explanation which will be easy to understand and it will explain quite a few things. Also, historically, it's the one…
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Book Chapter |
You're probably really upset that all you have so far is a simple little ray model of light. When do we get to the good stuff, you say? How about now? As a bonus, you get to look at lots of pretty colors. This chapter…
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It's time to take some of the things we know about light and put them to good use. In this chapter, the author discusses various optical instruments like antennae and lenses, and in the Applications section, you get to…
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Book Chapter |
If you browse through the sunglasses at your local department store, you'll find that some of them are advertised as "polarized." What is it that makes a pair of polarized sunglasses so special, and are they really…
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Book Chapter |
Light doesn't always travel in straight lines. It can bend around corners, just like sound. When it does change direction like this, you end up with light waves that originated from different places coming together at…
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