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Showing posts with the label physics

Kids Projects at Home

Simple Kids Crafts is a video blog dedicated to reviving the old art of handicrafts for people of all ages. How do oil spills affect aquatic plants? A Miniature Solar Panel Fire Water Balloon Make Clouds in a Bottle Secret Messages Make a Rocket Make a Hovercraft Make an Anemometer Make a Sundial Make a Radio Make an Electroscope Make a Stethoscope Make a Telescope Make a Periscope Make a Camera Bending a stream of water with a comb Lighting a bulb without electricity Simple Motor Cotton Ball Rocks? Salt-Absorbing Art and Science Color Changing Glue Art Baking Soda Clay Oil Sun Catcher Grow a Pineapple Plant! Bead Bowls Wow, what an Air-Gun Funny Diver ! Water boils without fire Ice with Boiling Water Water that boils instantly Water boils in a Paper Pot Soap-driven Boat Pulse Moves Pin Pretty Garden—without Plants Picture made by Fire Magic Pictures Dancing Doll Smoke Goes Down The Dancing Coupl The Umbrella Dance Magic Butterfly Colorful ...
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Bending a stream of water with a comb

Aim: To understand how static electricity works with a simple experiment. Materials required A water faucet. A plastic comb. Procedure: Run the comb through your hair thoroughly Open the tap and let the water flow with minimal force. Do not open the tap too much as the water stream needs to be thin. Bring the comb close to the water and hold it around 1-2 inches away from the water and 3-4 inches below the tap. Observe the stream of water bending towards the comb Scientific explanation: When two objects are rubbed against each other, electrical charge is accumulated. Before rubbing, the objects would have been electrically neutral, that is, they would have had equal number of positive and negative charges. However when they are rubbed together, depending on the nature of the objects, charges of one kind will get transferred to one of the objects so that one object will have a net positive charge and the other will have a negative charge. When you ru...
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Lighting a bulb without electricity

Aim: To charge up a light bulb using static electricity alone. Materials required: A light bulb. A plastic comb. Procedure: Go to a dark room. Take the comb and run it through your hair thoroughly several times. Hold the comb to the metal contacts at the base of the light bulb. Observe the filament of the bulb. You will see small pulses of light. Scientific Explanation: As you rub the comb through your hair, the friction between your hair and the comb cause electrons to jump from your hair to the comb, giving it a negative charge. When you touch the comb to the bulb, the electrons from the comb flow through the filament of the bulb and light it up briefly.
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Simple Motor

Aim: To make a simple home-made motor. Materials required: A thick walled paper or plastic cup. Two large metal paper clips. Five small circular or bar magnets. 60 cm of insulated 20 gauge copper wire. Insulation tape. Two code wires- insulated wires with alligator clips on the ends. A 1.5 volt battery or two for better results. Battery holder. Wire stripper. Black waterproof marking pen. Two thick straws. Procedure: Wind the insulated copper wire into a coil with about four or five loops with around 2.5 cm diameter. Leave some length at both ends free. Warp the uncoiled ends around the coil in opposite direction to the loops to keep the coil firmly in place as a coil. Leave 5 cm protruding at both ends after doing this. Use the wire stripper to strip off the insulation at both protruding ends of the coil. Use the black marker to colour one side of one protruding end of the coil. That is, if you turn the wire around you should be able to see the bl...
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Sunspots

Aim: To make a simple apparatus to view sunspots without harming your eyes. Materials required: A sheet of white paper. A telescope or if telescope is not available, a shoe box with a hole on one of the ends. Procedure: Hold the white sheet of paper in your hand or clip it onto a clipboard. Point the objective lens of the telescope towards the sun and the eyepiece towards the sheet of paper so that you get a circular image of the sun on the paper. Adjust the focusing knob on the telescope to get a sharp image. Observe and see if you can see dark spots on the bright disc like image of the sun. You may have to do the experiment on several days to see these spots. If you do not have a telescope available, simply make a hole in one end of a shoe box and face the side with the hole towards the sun so that the image of the sun falls on the opposite side of the shoebox. Scientific explanation: The sun is not uniformly of the same temperature. Some spo...
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Grow a Gummy Bear

This is a neat and easy science project for younger children. All you need is a package of gummy bears, some small see-through containers, water, and a marker. The time frame for this project can vary depending on how much time your child is given for the project. The project can be done in as little as a week (7 days) or it can be stretched out over a couple of months. Here are the basics: Take the small containers and the marker. Label the containers for the number of days your child is going to do the project. (Day 1, Day 2, Day 3, etc.) I recommend empty baby food jars with lids since the day can be written on the lid. Fill the containers about half full of water – cold or room temperature, not hot. For each day of the project, drop a single gummy bear into one jar and close the lid. I sorted my gummies by color, but this is optional.) Store containers in a cool space so that the water in the container does not get too warm and melt the gummy bear. (I stored the...
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Fooling Your Brain with a Mirror

Aim: To prove that what we see is often affected by what we expect to see with the help of the mirror image experiment. Materials required: 1. Mirrors – 2 in number, square in shape, 12 inches (30 cm) a side, could be either made out of plastic or glass. 2. Epoxy glue and duct tapes. 3. Wooden dowels – 2 in number with diameter as 1 inch (2.5 cm) and 12 inches (30 cm) long. Procedure: 1.      Stick the mirrors together by pasting their backs. If you have a glass mirror then for safety, tape their edges using the duct tapes to seal the sharp edges. Take the two wooden dowels and paste them right in the centre of the mirrors vertically. 2.      Hold the dowels with each hand and as you look at one side of the mirror move the hand which is on the other side. What do you actually see? What happens? Your brain expects the image in the mirror to move as it is fooled to believe that the image it sees is actually your othe...
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The Mathematics of Sympathetic Vibrations

Objectives/Goals  Which notes on a piano can induce sympathetic vibrations on an open string? Mathematical relationships between test note and open string frequencies will be used to predict which notes cause sympathetic vibrations. I predict the three test notes in my sample that are harmonics of the open string will resonate the longest. Methods/Materials  Materials used were: a piano, a stopwatch, a frequency chart, and a helper. I depressed a piano key, the damper lifted and the string was "open," or free to vibrate. I played all the notes in one octave higher than the open string. My helper timed the durations of the tone coming from the open string. I averaged and graphed the results.  Results  The thirteen test keys in each sample caused the open string to resonate. Seven test keys caused brief resonance; the vibration inside the sound box caused the open strings to produce a tone.  Three test keys produced tones of intermedi...
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