For some time I've been pondering new ways to improve the current methods of self defence that are available to us. Martial arts takes quite some time and pepper spray and tasers are children's toys from my point of view. I need something that is sure to scare away any stray attackers. So I came up with a simple outline
There is something special about a secret knock. It gets you into secret super villain meetings and is a surefire way to test for rotating bookcase passages. Secret knocks usually work with an intimidating drug lord and for policeman listening at the door for the correct pattern of raps.
This is a easy tutorial of Pepper expansion.Hi I am dheeraj this is a mad science tutorial this is very easy I'll tell you more of experiments lets start .Before starting how does this work this actually it works on principle of surface tension. Surface tension holds the surface molecules of liquids tightly. So the pepper particles when soap applied , they get moved when molecules are Holden tightly.Lets Do this :D
As you read in the heading this is simple compressed air cannon which you can build with PVC pipes from your local hardware store for a couple of bucks.
As you read in the heading this is simple compressed air cannon which you can build with PVC pipes from your local hardware store for a couple of bucks.
As you read in the heading this is simple compressed air cannon which you can build with PVC pipes from your local hardware store for a couple of bucks.
Doorbells are a great idea. They let you know when someone who's not a burglar is trying to enter your house, apartment, or squat. They eliminate the need for lots of noisy yelling and startling door pounding.
In this video i wanted to show how the railway signal works. Sorry for a poor quality, this is my first video on youtube. Interesting thing. When train is approaching to the road crossing, signal immediately turns on. The secret is that there is a signal coming through the rails, and when train is near, it close this signal and siren starting work.
Grab a cup, a pair of scissors, a black marker, a box of matches, a plate, and a few tea bags. Open a tea bag and pour the contents into a cup. Use the scissors to cut the empty tea bag in half. Now with the marker give your tea bag a ghostly face. Place your ghost on the plate standing up and light a single match. Light the top of the ghost and watch your ghost take flight!
Inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line. Attach a string to the center of the fidget spinner. Give it a good spin on the table and raise the spinner with the string. If you tilt the spinner in any angle it will keep the angle of rotation unless it is changed by an internal force. Give it a try and see it in action!
In theory an egg shell works similar to the enamel found on your teeth. Grab a can of Coke, an empty jar, and one delicate egg. Place the egg within the jar and pour the coke over the egg. Store the jar in a safe place for one day. Once twenty four hours have passed, open the jar and pour the soda into a bowl slowly, leaving the egg in the jar. Gently remove the egg from the jar and examine what the soda has done to the shell. Remember the egg represents the enamel on your teeth!
Grab a glass jar with two lids and 50% alcohol. Pour just enough alcohol to coat the entire inside of the jar. Put a lid on the jar and shake it around to get the alcohol to spread all around the inside. Grab the second lid and make a hole in the middle of it. Replace the lid with the lid you just made a hole in. Take a match from a matchbox, strike it and place it near the hole in the lid. Enjoy the reaction!
Setup: Grab three cups. Separate two cups just far apart to place a dollar bill on top of both of them. The third cup will be placed on top of the dollar bill.
In this experiment, you will need a single egg, thongs, a lighter, and a cup filled with water. Grab the egg with the thongs. Now with the lighter, start burning the egg to create soot all around the egg. You will end up with a black egg. Grab the cup filled with water and gently place the black egg into the water. You went from a white egg, to a black egg, to the end result of a silver egg!
Setup: Grab a matchbox and three matches. Stand the matchbox on its side. Sandwich a single matchstick between the insert and the cover. One on the left and one on the right. Between the two matches, add the third match.
In this experiment we used lots of short ball chains and connected them all. *Note - if you don't have tons of ball chains, you can use Rigatoni pasta and pass a rope through them connecting them all. You can even color them different colors for an added effect too!
Get your hands on as many pencils as possible, the more the merrier! Go ahead and sharpen all of them to a nice sharpened point. Then get a ziplock bag and fill it with water. This is where it gets interesting, start on one side of the ziplock bag and put the pencil through it so it comes out from the other end. There is a trickle of water at times but the majority of the water will not spill. See how many pencils you can put through the ziplock bag!
Get your inflated balloon ready to pop! Place one thumbtack on the table. Will the balloon pop? Of course! Now place as many thumbtacks as possible on the table. Will the outcome be the same?
Are the kids bored? Need something for a school project? Want a great activity for a family night? In this tutorial I am going to show you how to make slime! This easy slime recipe only requires 3 basic everyday household ingredients, with an optional 1 or 2 more ingredients. The slime is non-toxic and super safe to play with. Don't eat it though! So let's get to it, let's make some slime!
The big fireworks day is almost here, but most of you are limited in what you can do when it comes to celebrating the Fourth of July with a bang. Unless you live in a dry area prone to wildfires, one type of fireworks you can probably still legally buy are sparklers.
As Alfred monologued in The Dark Knight, "Some men aren't looking for anything logical, like money. They can't be bought, bullied, reasoned, or negotiated with. Some men just want to watch the world burn."
Frosty the Snowman is a fairy tale they say, but this microscopic snowman is very real and just broke the record for the world's smallest snowman. (Though, it's not Guinness-official yet.)
We can use DVD Drive to generate small amount of current and can light two or three LED. The trick simply is DVD Drive contains a motor inside it when dismantle the DVD Drive we can rotate that motor by sliding one of the DVD drive part. Thus after rotation in motor it generates very small amount of electricity and we can light up LED. Watch the video how to disassemble the DVD Drive learn the trick and share with your friends.
Whether you've got an itch for a mini-flamethrower, a shower of burning sparks, or a exploding ball of flames, these little fireworks-producing lighters may be the answer to your pyrotechnic cravings!
I would like to make the explosive polymerization with p-nitro aniline and sulfuric acid. I work in a laboratory and have access to the chemicals. I have seen several videos on Youtube and it looks awesome... When I try nothing happens, even after 10 minutes of heating. I have mixed 2 sp of the aniline and approximately 1 ml acid. I heat with a bunsen burner. Any good suggestions why it won't work? Best regards Jørgen
Whether you're in an airport, restaurant or waiting room, the insidious grip of televisions on human life is omnipresent. Sometimes it's nice to talk to other human beings while looking at them directly—actually hearing what they have to say.
I love making beeps and bloops with the Arduino pitches library, but sometimes archaic 8-bit tunes just don't cut it. Whether you want your robot to terrify your enemies with a demonic synthetic voice, you just need a pocket boom box on the go, or you want to a miniature guitar amp, a simple LM386 amplifier can crank up those signals loud enough to play through any speaker.
If you've got a birthday party to plan for a young budding scientist coming up, a little nitrogen should do the trick. In this project, I'll show you 10 "super cool" tricks with liquid nitrogen that you could try, but probably shouldn't!
Carving pumpkins into creepy looking jack-o'-lanterns for Halloween can actually become fairly boring and tedious if you're doing the same thing year after year. This time, jump into a whole new realm of Halloween fun with some exploding pumpkin faces! I like to call them blast-o'-lanterns, but can call them whatever you want.
Home chemistry is great, but what happens when you forget to label your chemicals? How do you know if you turned a clear glass of ammonia into a clear glass of unobtainium? Chemists have a tool for just that.
