Look at the stage of a rock ‘n’ roll concert and you’re likely to see a wall of speakers. Get close to these speakers and you’ll discover that they are big, really big. Big speakers have a larger vibrating surface than smaller speakers. This larger surface area can transfer vibrations to many more air particles

Purpose to compare the weight of a paper creature with that of paper punches.Things Required:Balance from Experiment Straw See-sawPaper hole puncherIndex cardScissorsPencilDirections:Draw your version of a space creature on half of the index card. Cut out the creature and place it on one of the weighing pans of the balance paper. Cut paper punches from

With the help of this experiment you can construct your own Morse Code Station.Things Required:Four “D” cells in battery holdersTwo torch bulbs in lamp holdersTwo switchesFour brass fastenersPlenty of connecting wire with ends stripped bare of insulationDirections:Assemble two separate Morse code stations that look like this: Next, place the two stations at different locations and

You may have played on a see-saw in parks or gardens. But how does the centre of gravity affect a balance? This is what we are going to find out.Things Required:Straight pinSmall index cardStrawScissors2 wooden blocks of equal height and not as wide as the length of the strawRulerMarking penDirections:Use the ruler to find the

So far, the electricity you’ve generated has been produced by chemical reactions. Although this source of electricity is important yet most of your home is supplied by electricity that has been produced by generators. Generators are large devices that change the energy of spinning magnetic fields into electric current.Things Required:Strong bar magnet10 yards of 24-gauge

Slide your fingers along the neck of a guitar and you’ll feel ridges. These ridges divide the neck into distinct regions called frets. When the string is pressed, its vibrating length is determined by the nearest fret. Frets closest to the sound hole produce the highest notes. Frets farthest from the sound hole produce notes

This experiment is almost magical in nature. The purpose is to demonstrate that the centre of gravity is the balancing point of an object.Things Required:Yardstick (metre stick)Hammer (wooden handled hammer works best)String, 12 inches (30 cm)Directions:Hold the ends of the string together and tie a knot about 2 inches (5 cm) from the ends. Insert

A single cell made of two metals can produce only a small “push” of charge. To increase this push, several cells can be wired together. This arrangement of side-by-side cells forms an electrical device known to scientists as a battery.Things Required:Three copper coinsThree iron washersSteel woolBlotter paperPair of scissorsSaltWaterCurrent meter (assembled in “Simple Multimeter”)Directions:Polish the

Like clarinets and saxophones, flutes are woodwind instruments. The column of air in a flute, however, is not set in motion by a vibrating reed. Instead, the flutist must blow across the opening of the mouthpiece. When the stream of air flows through this hole at the right angle, it produces a soft “whistle”. As

How does shape affect speed? In this experiment we are going to find an easy answer to the above question.Things Required:Card table2 books of equal thickness1 large roll of masking tape2 jar lids, the same sizeMarbleMasking tableHelper Directions:Tilt the card table by placing one book under two of the legs. Place the lid tops together

In this experiment, you will make current from ordinary lemons.Things Required:LemonCopper coinStrip of zinc (obtained from hardware store)Steel woolKnifeCurrent meter (assembled in “Simply Multimeter”) Directions:Use the steel wool to shine the surfaces of the coin and the zinc strip. File down any sharp edges of the zinc strip.Ask an adult use the knife to punch

I am not talking about the dried fruit, Kazoo. Kazoos are great fun, especially for those who don’t have a great singing voice. Just hum into the mouthpiece and the vibrating drum enriches your sound with a chorus of buzzing plastic. Although you can purchase kazoos at local toy stores yet- here’s one that you

The idea of this labour is to determine how the length of a pendulum affects the time of each swing.Things Required:StringWasherScissorsRulerHeavy bookTableStop watch or watch with a second handHelper Directions:Cut a string the height of the table. Tie one end of the string to the washer, and use tape to attach the other end of