How Does a Speaker Work?

How Does a Speaker Work?

It’s easy to look at a piece of technology (like a speaker) and feel like you’re looking at a black box, wondering how they work. What’s hidden inside them? It must be complicated, right? Often times, that holds some truth. But you would be surprised how far you can get if you can nail down

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Can you change the color of oudin coil sparks?

Can you change the color of oudin coil sparks?

An Oudin coil can take the energy out of your outlet and create sparks you can see! It’s sometimes called a mini tesla coil. The sparks on them usually look violet. If you know the visible light spectrum, you might know that violet light is the most energetic color of light.  The oudin coil looks

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Electric Motor DIY

Electric Motor DIY

An electric motor is a device used to convert electrical energy to mechanical energy. Electric motors are extremely important in modern-day life. They are used in vacuum cleaners, dishwashers, computer printers, machine tools, cars, subway systems, sewage treatment plants, etc, and you can make your own at home! Here’s how: Materials: Copper wire D battery

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Wind Power at AstroCamp

Wind Power at AstroCamp

 Wind farms are a common sight these days, but humans have been using wind power for about 2,000 years. It wasn’t always for electricity, however, but to mill grain into flour, operate an organ, or pump water. How does a windmill do any of that though? When you see a windmill, the part that

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Static Electricity: It’s Shocking

Static Electricity: It’s Shocking

Have you experienced rubbing your feet on carpet just to reach out to someone and give them a little zap? Or slide down a plastic slide and gotten a nice jolt from it?  What about rubbing a balloon on your head to make your hair stand on end? A Van De Graaf generator is a

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DIY Soda Battery

DIY Soda Battery

 Elementary school students the world over are familiar with potato batteries or lemon batteries, but did you know you can make a battery from soda? With just some wire, two different kinds of metals, and your favorite soda, you can build your own battery! All you need to do is connect your metal plates

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How Spinning Magnets Make the World Turn

How Spinning Magnets Make the World Turn

We all know know what magnets are. At the very least, you’ve probably put one on the fridge. Magnets can come in all shapes and sizes, but they all work the same way. In simple terms, they have a north pole and a south pole. When two identical poles get close, they repel, and–of course–opposites

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What Color is Lightning in a Beaker?

What Color is Lightning in a Beaker?

Thunderstorms can be incredible to experience. From the bright flash of lightning that is often almost to fast too see, to the immense crack of nearby thunder that can make your heart feel like it skips a beat, they truly are a demonstration of the power of nature. Image Credit: NASA They are also full

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What is an Electromagnet?

What is an Electromagnet?

Here at AstroCamp, one of our most popular classes is Electricity and Magnetism. At first glance, it might not be obvious how these things are related, but they are actually tied together through important physical principles. To give you some evidence, let me introduce the electromagnet. This is really just a metal rod wrapped with

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Lightning Electricity in the Palm of Your Hand

Lightning Electricity in the Palm of Your Hand

During a thunderstorm, lightning often appears to flash instantaneously from cloud to ground, but there’s much more going on than meets the eye! Friction between air currents causes a buildup of negative charge in the lower parts of the clouds. Like charges repel each other, so the excess negatives begin developing an escape route. Strong,

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DIY Electric Motor

DIY Electric Motor

Electric generators change mechanical energy into electrical energy. An electric motor does the opposite: it changes electrical energy into physical motion. This conversion is possible because of the Lorentz force. Electricity is just the movement of electrons through a loop, called a circuit. Ever notice how magnets can repel or attract objects without touching them?

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Fantastic Plasma

Fantastic Plasma

The universe is full of action at a distance. Planets and stars tug on each other via the gravitational force. Magnets attract or repel based on their polar orientation. An object’s area of influence is called its field. Gravity, electricity, and magnetism are some of the most common field interactions. The plasma ball’s central electrode

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