How to Make a Door Alarm

Door Alarm:-

A homemade alarm might be just the thing to alert you when a nosy sibling is poking around. Even for general home protection, a homemade alarm can take burglars by surprise. Ready yourself for building and mounting your alarm by gathering your materials and preparing the base of the alarm. Build the alarm by wiring together a simple circuit for your buzzer. Install your alarm by attaching components to the board and setting up the pull-string that'll trip your alarm.

MATERIAL:-

1. 1.5 volt battery
2. 1.5 volt mini buzzer
3. Cardboard (like from a cereal box)
4. Electrical tape
5. Glue
6. Insulated wire (3 strands, small gauge)

METHOD:-

1. Tape the battery and buzzer onto your wooden board. Use electrical tape to attach these to the wood. The tape should not interfere with or cover any of the connections for the electrical circuit for the buzzer, nor should it cover the positive (+) or negative (-) ends of the battery.
2. Your buzzer may come with screw holes. For a sturdier alarm, you can screw your buzzer into the wood. Be careful to use short nails so these don't protrude through the board.
3. Wrap the stripped wire around the ends of the clothespin. Wrap one stripped end of two pieces of wire around frontmost divot of the top of the clip-end of the clothespin. Do the same to the bottom of the clip-end of the pin with a separate wire. Twist the stripped wires around the pin until they are tight.
4. When the pin closes, the wires should touch. This will complete the circuit that sets off your alarm.
5. Connect the bottom-pin wire to the battery. Position the wire so it is directly touching the positive (+) end of the battery. Use a piece of electrical tape to fasten the wire in place. If your battery is in a dock or cradle, attach the wire to the positive connector or wire for the cradle and tape it in place
6. Connect one non-battery wire to the buzzer. There should be a small opening in the buzzer where you can insert your wire. There should be two connectors, positive and negative. Touch one of your top clothespin wires directly to the positive input for the buzzer.
7. Alternatively, your buzzer may have wire leads coming off of it. Strip these, if necessary, and twist your non-battery wire to the positive buzzer wire.
8. Break the circuit with a piece of cardboard. Cut a medium sized piece of cardboard to insert between the wires wrapped around the clothespin. Insert the cardboard so that the wires on the clothespin do not touch when it is closed. This will stop the buzzer from going off.Any non-conductive material will work to break your circuit. Try small pieces of paper, wood, or rubber.
9. You may need to fold thin cardboard so there is more distance between wires. Very thin cardboard may not reliably keep the circuit broken.
10. Connect the remaining wires. Attach the stripped end of one of your remaining free clothespin wires to the negative (-) end of the battery. Fasten it with electrical tape. Then, in the same fashion as the first, attached the final clothespin wire to the negative (-) input for the buzzer.
11. After you finish attaching the wire to the buzzer, cover any remaining bare wires with tape. While the circuit is engaged, touching bare wire will result in a shock.
12. Be careful not to knock out the circuit breaker between the wires of your clothespin. Doing so will complete the circuit, and likely cause a small shock when you try to attach the wire to the buzzer.
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14. Test the switch by completing the circuit. Lay your alarm on a flat surface. Open the clothespin and remove the circuit breaker (piece of cardboard). When the clothespin closes, the circuit should complete and the buzzer turn on.
15. The ends of stripped wire on the clothespin should be in good contact. If they aren't or are just barely touching, wrap more wire around the clothespin.
16. When adjusting the clothespin wires, disengage your battery from the circuit to prevent getting shocked.

How to make UV light

SMART PHONES:-

Turn Your Phone Into A Black Light Hack. Its super easy to do!

All it takes is a smartphone with a light, three pieces of small tape and two sharpies. One blue, one purple.

Material:-

1. Smart Phone
2. Scotch Tape
3. Blue Sharpie
4. Purple Sharpie

Methods:-

1. Place a small piece of tape over the LED flash on the back of your iPhone or Android smartphone (will also work on tablets with built-in flashes), which should be close to your rear camera.
2. Color on top of the tape with blue marker so that it covers the flash.
3. Place another piece of tape over top of the flash, and color on top of it with blue marker as well.
4. Place a third and final piece of tape over the flash, but this time color over the flash with your purple marker.
5. You're done! Enjoy the lights
   
   
   

How to make invisible ink

Invisible ink is any substance that you can use to write a message that is invisible until the ink is revealed. You use the ink by writing your message with it using a cotton swab, dampened finger, fountain pen, or toothpick.

MATERIALS:-

1. Highlighter (I got a pack of 4 different colors for only $1)
2. 1 cup (plastic works best, so you don't have to worry about washing it out)                     
3. 3 Tablespoons hot water
4. Cotton swab
5. Pliers

METHODS:-

Step 1:Take Apart the Highlighter

Start by taking the cap off. set aside.
Using the pliers, grab and pull of the front plastic piece of the marker.
Next, slide the ink cartridge out of the back of the marker.
Then, also using the pliers, pull the tip of the marker out.

Step 2: Extract the Ink

Place the foam ink cartridge and marker tip in the plastic cup
Poor the 3 tablespoons of hot water over the cartridge
Let the ink cartridge soak for about 5 minutes
Squeeze all excess ink from the cartridge, then let soak a little more. repeat until the cartridge is a light color, and the water is dark.

Step 3: Test the Ink

Using a cotton swab, dip one end into the ink.
tap all excess ink off.
write something on your arm. I did a G for green.
if it you can see it on your arm, then you didn't get enough off the excess ink off. just dab the excess off your arm, and it will be fine.
Go into a dark room, turn on a black light or UV light, and watch the message glow!

How to make a Volcano

A chemical reaction between vinegar and baking soda creates a gas called carbon dioxide. Carbon dioxide is the same type of gas used to make the carbonation in sodas. What happens if you shake up a soda? The gas gets very excited and tries to spread out. There is not enough room in the bottle for the gas to spread out so it leaves through the opening very quickly, causing an eruption.

NOTE: This should be done, outside due to the mess.

MATERIAL:-                    

1. 10 ml of dish soap
2. 100 ml of cold water
3. 400 ml of white vinegar
4. Food coloring
5. Baking soda slurry (fill a cup about ½ with baking soda, then fill the rest of the way with water)
6. Empty 2 liter soda bottle.

METHOD:-

1. Combine the vinegar, water, dish soap and 2 drops of food coloring into the empty soda bottle.
2. Use a spoon to mix the baking soda slurry until it is all a liquid.
3. Eruption time!  Pour the baking soda slurry into the soda bottle quickly and step back.

How to Make Galaxy Slime

How to Make Galaxy Slime

Galaxies are a dazzling sight to many, and slime is a fun and useful "toy" that many enjoy playing with. Why not combine the two and create a fun slime that also looks quite neat? A sparkly and stretchy slime that reminds you of the universe is both fun to make and stretch, and squish, and poke.

MATERIAL:-

1. 360 milliliter (13 imp fl oz; 12  fl oz) clear liquid glue (white glue is a substitute for it, but the clear glue looks better).
2. 300 milliliter (11 imp fl oz; 10  fl oz) water.
3. Dark blue, Black, Pink, Purple food coloring. 
4. Fine glitter
5. Regular glitter.

METHOD:-

• Add 1 teaspoon of borax to 500 milliliter of hot water. Stir it thoroughly and then set it aside to cool.

• Separate the glue into three bowls. Pour about 120 milliliter  of clear glue into each bowl.

• Pour 100 milliliter of water into each bowl.

• Add both the blue and black food coloring into one bowl,  pink food coloring into the second bowl, and  purple food coloring into the third bowl.

• Shake both types of glitter into each bowl.

• Use a stick to combine the glue, water, food coloring, and glitter. When fully combined, the glue, glitter, and color will be evenly dispersed, and won't "clump" in certain areas.

• Pour a third of the borax mixture into one bowl. Stir quickly and thoroughly as the slime begins to stick together.

• Repeat with the other two slime mixtures.

• Knead the slime with your hands. At this point, if the slime is still fairly watery, knead it with your hands to help it gain a more solid shape.

• Carefully combine the slime  by kneading them together. Don't blend them too much, or they'll end up losing their color.

• Play with your sparkly galaxy slime. 

ENJOY AND HAVE FUN

Rainbow in a Jar

Rainbow in a Jar 

This resembles what you see when you shine light through a prism. The glass splits the white light up into its different frequencies. 

Materials:

• 1 jar
• 1/2 cup blue dishwashing liquid  
  
• 1/2 cup olive oil
• 1/2 cup rubbing alcohol
• 1/2 cup light corn syrup
• Food coloring
• 5 spoons
• 5 bowls for mixing

Procedure:

1. Make your purple layer by mixing 1/2 cup of the light corn syrup with 1 drop of blue and 1 drop of red food coloring.
2. Carefully pour it into the bottom of your jar.
3. Carefully pour the blue dish soap down the side of the jar.
4. Mix 1/2 cup of water with 2 drops of green food coloring.
5. Carefully pour in your green water down the side of the jar.
6. Gently pour 1/2 cup olive oil down the side of your jar.
7. Mix 1/2 cup of rubbing alcohol with 2 drops of red food coloring.
8. Carefully pour the red rubbing alcohol down the inside of your jar.
9. Being careful not to disturb your liquids, set your jar down on the table and enjoy your rainbow. 
10. Your Rainbow is ready

Movable Pulley

DEFINE:-

A movable pulley is a pulley that is free to move up and down, and is attached to a ceiling or other object by two lengths of the same rope. Examples of movable pulleys include construction cranes, modern elevators, and some types of weight lifting machines at the gym.

Materials:-

• 2 tall surfaces of the same height (tables, countertops, or a countertop and a table)
• 3 2”x4” wood planks, long enough to span the distance between the tall surfaces
• 4 fixed pulleys
• 2 movable pulleys
• Rope that fits the pulleys
• Screws
• Screwdriver or drill
• Toolbox with handle
• Tools, books, and other objects to add weight to the toolbox
• Scale

Procedure:-

1. Using the screws and your screwdriver or drill, attach one fixed pulley to a point slightly off-center on one of your 2”x4” plank.
2. Feed the rope through the pulley.
3. Feed one end of the rope through a moveable pulley.
4. Attach the end of the rope fed though the movable pulled to the 2x4 plank, about 1 foot away from the fixed pulley.
5. Set the wooden plank between two high surfaces so the pulleys are facing down. 
6. Attach the handle of the toolbox to the movable pulley.
7. Place different objects in the toolbox until it is heavy. Weigh the toolbox on the scale.
8. Pull down on the free end of the rope and lift the toolbox. Record your observations. How much can you lift with the assistance of the movable pulley ?

I hope you enjoy

Fixed pulley

Materials

• 2 tall surfaces of the same height (tables,countertop and a table)
• 3 2”x 4” wood planks, long enough to span the distance between the tall surfaces
• 4 fixed pulleys
• 2 movable pulleys
• Rope that fits the pulleys
• Screws
• Screwdriver or drill
• Toolbox with handle
• Tools, books, and other objects to add weight to the toolbox
• Scale.

Fixed pulley

1. Using the screws and a screwdriver or drill, attach one fixed pulley to the center of a 2 x 4 plank.
2. Feed the rope through the pulley.
3. Attach one end of the rope to the toolbox handle.
4. Place a few objects in the toolbox until it feels heavy. Weigh the toolbox on the scale. Record its weight.
5. Set the wooden plank between your two tall surfaces so the pulley is facing down.
6. Pull down on the free end of the rope and lift the toolbox. Record your observations. How much can you lift with the assistance of the fixed pulley?
7. This is the today project I hope you will like.
8. I am hardly requesting please in adult supervision. 
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BUBBLES IN A BOTTLE

           

You will need

• 1] A clean 1 liter clear soda bottle
• 2] 3/4 cup of water
• 3] Vegetable Oil
• 4] Fizzing tablets (such as Alka Seltzer)
• 5] Food coloring

What to do

1. Pour the water into the bottle.
2. 1] Use a measuring cup or funnel to slowly pour the vegetable oil into the bottle until it’s almost full. You may have to wait a few minutes for the oil and water separate.
3. 2] Add 10 drops of food coloring to the bottle (we like red, but any color will look great.) The drops will pass through the oil and then mix with the water below.
4. 3] Break a seltzer tablet in half and drop the half tablet into the bottle. Watch it sink to the bottom and let the bubble greatness begin!
5. 4] To keep the effect going, just add another tablet piece. For a true lava lamp effect, shine a flashlight through the bottom of the bottle.
6. THANK YOU FOR VIEWS

Why i choose Mechanical engineering?

    

Job Satisfaction:-

It's important to find a career that you enjoy. After all, you'll probably be spending eight hours or more a day, five days a week, at your job. Engineering can provide a satisfying field of work.

 Variety of Career Opportunities :-

From electrical and computer engineering to environmental and biomedical engineering, an engineering degree offers a wide range of career possibilities. But the majority of today's college graduates will have more than one career during their work life, and engineering can provide a strong foundation for almost any one of them.

Potential to Benefit Society :-

As an engineer, you can choose to work on projects that benefit society, such as cleaning up the environment, developing prosthetic aids for disabled persons, developing clean and efficient transportation systems, finding new sources of energy, alleviating the world's hunger problems, and increasing the standard of living in underdeveloped countries.

Learn about Servant Engineering at George Fox

  

Challenging Work :-

There is no shortage of challenging problems in engineering. There is no single answer, no answer in the back of the book, no professor to tell you that you are right or wrong. You must devise a solution and persuade others that your solution is the best one.

  

 Intellectual Development :-

An engineering education will "exercise" your brain, developing your ability to think logically and to solve problems. These are skills that will be valuable throughout your life – and not only when you are solving engineering problems.

    

Creative Thinking  :-

Engineering is by its very nature a creative profession. Because we are in a time of rapid social and technological changes, the need for engineers to think creatively is greater now than ever before. If you like to question, explore, invent, discover, and create, then engineering could be the ideal profession for you.

    

 Technological and Scientific Discovery:-

Do you know why golf balls have dimples on them, or why split-level houses experience more damage in earthquakes? An engineering education can help you answer these questions, and push you to ask new questions of your own.

  

Financial Security :-

Engineering is a lucrative career. Engineering graduates receive the highest starting salary of any discipline.

Engineering job outlook

Prestige

Engineers help sustain our nation's international competitiveness, maintain our standard of living, ensure a strong national security, and protect public safety. As a member of such a respected profession, you will receive a high amount of prestige.

 Professional Environment  :-

As an engineer, you will work in a professional environment in which you will be treated with respect, have a certain amount of freedom in choosing your work, and have the opportunity to learn and grow through both on-the-job training and formal training.

What is Mechanical Engineering?

Mechanical engineering is a diverse subject that derives its breadth from the need to design and manufacture everything from small individual parts and devices.The role of a mechanical engineer is to take a product from an idea to the marketplace. In order to accomplish this, a broad range of skills are needed. The mechanical engineer needs to acquire particular skills and knowledge. He/she needs to understand the forces and the thermal environment that a product, its parts, or its subsystems will encounter; to design them for functionality, aesthetics, and the ability to withstand the forces and the thermal environment they will be subjected to; and to determine the best way to manufacture them and ensure they will operate without failure. Perhaps the one skill that is the mechanical engineer’s exclusive domain is the ability to analyze and design objects and systems with motion.