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Lesson Plan for Making a Speaker Laboratory

Lesson Plan for Making a Speaker Laboratory
©1995 The Regents of the University of California by Regan Lum Introduction: A speaker is a device that converts an electronic signal into sound. The speaker you will build (see figure 1) consists of a Styrofoam or paper cup, a coil of wire, a permanent magnet, and a signal source. The electronic signal goes through the coil and creates a varying electromagnet. figure 1 Purpose: In this laboratory, you will explore how a speaker works. Materials: 1 permanent magnet 2 feet of wire 1 pencil tape or glue 1 Styrofoam or paper cup 1 signal source (tape player) 1 plug with alligator clips for tape player Procedure: Assemble material as shown in figure 1. Leaving about 10 centimeters on the end, wrap the wire around a pencil to make a wire coil and tape or glue it to the bottom of the cup. Conclusion Does the volume control on the tape player work on your speaker? Return to CEA Science Education Home Page

http://cse.ssl.berkeley.edu/lessons/indiv/regan/speakerlab.html

WHAT DO PHILOSOPHERS BELIEVE? The Visual CV: in a career spanning half a century, Sir Tom Courtenay has gone from a new-wave warrior to a grand old man, via a fool or two (usually called Norman). Irving Wardle picks his best roles on stage and screen From INTELLIGENT LIFE magazine, January/February 2013 1960 The SeagullArriving on the London stage as a RADA graduate from the fish docks of Hull, Tom Courtenay achieved overnight fame as Chekhov’s Konstantin. This was a time when British audiences were used to seeing Konstantin as a lyrically romantic juvenile.

Electronic Projects For Beginners I made a guide for those people who are still starting with their electronics hobby. I started connecting wires, batteries, bulbs, buzzers and motors when I was 4 years old . Now that I am 13 years old, I now have a good amount of experience to build complicated electronic circuits. A CD spectrometer A simple spectrometer can be built from a CD and a box. Cut a slit on one side of the box. Place the CD on the other side with about 60 degree angle. Look down into the openning on the box. The slit should not be too wide, otherwise the spectrum lines will be blurred. It should not be too narrow either, otherwise the spectrum is too dim. 70 Photographs That Will Take Your Breath Away We here at DPShots believe that the easiest way to learn photography is to learn it by example. Every now and then we come up with some amazing photography examples that take your breath away. This post is no different. We have collected some of the most amazing, most awesome and THE most beautiful photography we could ever get our hands on. This post will help a lot of budding photographers to see where they are headed.

24 - THE DIRTY - Dirty Laundry - {the blog} Friendship Day is 8/7. So I'm going to try my hand at making some friendship bracelets for a few of my friends that have helped me SO much with Dirty Laundry over the past several weeks. I'm going to try to make some snazzy ones! Here is my inspiration. 1. 50 Life Secrets and Tips Memorize something everyday.Not only will this leave your brain sharp and your memory functioning, you will also have a huge library of quotes to bust out at any moment. Poetry, sayings and philosophies are your best options.Constantly try to reduce your attachment to possessions.Those who are heavy-set with material desires will have a lot of trouble when their things are taken away from them or lost. Possessions do end up owning you, not the other way around. Become a person of minimal needs and you will be much more content.Develop an endless curiosity about this world.Become an explorer and view the world as your jungle. Stop and observe all of the little things as completely unique events. Try new things.

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How to Extract DNA from Anything Living First, you need to find something that contains DNA. Since DNA is the blueprint for life, everything living contains DNA. For this experiment, we like to use green split peas. But there are lots of other DNA sources too, such as: Visiting 10 of the Most Interesting Abandoned Places on Earth Travelers looking for a getaway from the normal getaway should skip the sandy beaches to walk amid silent relics in Namibia, Chernobyl or an abandoned California gold mining town. These empty places may look like Scooby Doo set pieces, but they hold important clues to bigger mysteries about both the past and the future; the creep of urban decay and the necessity of memorializing tragedy. Sometimes history lives alone. We bring you 10 modern ghost cities where you can choose your own adventure, exploring what once was and what could have been.

Day 63 – DIY Corona Glasses I cannot even tell you how excited I was when I found this pin explaining how simple it is to cut glass bottles. For our first anniversary, my husband signed us up for a glassblowing class. It was awesome and we had a great time. As we were leaving, one of the artists was turning Corona bottles into drinking glasses for a friend’s wedding gift. I was wondering why these glasses weren’t one of the projects we could choose from that day.

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