Category How does It works, How things work, How is it done, Curiosity

Create your own boat with a few supplies found around the house. Most real boats use sails or motors to make them move across the water, but you can move your boat around a bowl of water using a magnet.

You Will Need:

• a horseshoe or bar
• magnet a large needle pins a plastic lid (from a margarine tub or coffee can)
• a small square of paper decorated as a sail
• a large bowl of water

What to Do:

1. Choose the magnet pole you will use. Use only one pole-north or south. Ask an adult to stroke the end of the magnet down the length of the needle 50 times from the eye to the point. Always rub in the same direction.

2. Test the needle to see if it now has a magnetic pull. Will it pick up a pin? Be very careful since you are using pins and needles.

3. Have an adult rub the needle 50 more times with the magnet. Make sure you use the same pole. Pin the magnetic needle through the paper sail.

4. Fasten the sail in the centre of the plastic lid. Float the raft in the bowl of water. Use the different poles of the magnet to push and pull the raft across and around the water.

Picture Credit : Google

Have you ever noticed how the water in the bath rises when you get in? This happens because your body weight pushes the water aside, or displaces it.

What happens when you get into a larger body of water like a swimming pool? You’ll float! Your body pushes aside enough water to equal your weight. But the water also pushes back against your body, so you float! This is called buoyancy. Buoyancy is the upward push of displaced water.

If you could weigh the water your body displaced, it would be equal to the pressure of the water pushing up on your body. The pressure pushing up cancels out your weight pushing down.

So why do some objects sink? Objects that are heavier than the same amount of water sink in water. When you throw a rock into the water, it weighs more than the amount of water it displaces, so it sinks.

Picture Credit : Google

People all over the world use trains. There are many different kinds of trains. Some trains pull wagons filled with goods. Cattle, oil, coal, and cars are transported in special types of wagons. Trains also carry container trucks and containers for ships.

Trains that carry people are called passenger trains. Passenger trains have toilets. They sometimes have a dining car so that passengers can eat. Some even have sleeping cars.

Some passenger trains make short trips. Many people travel to work in such trains. These trains are very fast. France and Japan have some of the world’s fastest intercity (between cities) trains.

Tracks keep the train on its path. The motor turns the wheels. The wheels turn on tracks. Most tracks are made of two rails, but some use only one rail.

Trains have many cars linked together. The locomotive provides the power. It is usually the wagon at the front, but an engine can pull or push a train, so sometimes it is at the rear of the train. Trains are powered by steam, diesel fuel, or electricity. Few steam engines are used today. Modern locomotives are faster and cleaner than steam engines. They use less fuel, too.

Tram cars are trains that look like buses. They have one car that holds many passengers. Their metal wheels run on two rails in the street. A cable hangs above the rails. It supplies electric power for the tram.

Subway trains move on tracks underground. They also have a third rail. The third rail provides electric power to make the train move.

Picture Credit : Google

A campervan (or camper van), sometimes referred to as a camper, caravanette, or motor caravan, is a self-propelled vehicle that provides both transport and sleeping accommodation. The term mainly describes vans that have been fitted out, often with a coachbuilt body for use as accommodation.

Campervans may be equipped either with a “pop-up” roof which is raised during camping or a fixed roof, either shared with the commercial van that forms the basis of the vehicle (commonly a “high-top” model), or as part of a custom coachbuilt body.

Campervans usually have a small kitchen with a refrigerator (which is often powerable by a choice of gas, battery, or mains electricity) and a two-burner gas hob and grill. They generally have dual-voltage lighting which can work from either a dedicated battery (other than the van battery) known as a deep-cycle or leisure battery, or from AC power, supplied at a campsite via a hook-up cable. Larger models may include a water heater, space heating and air conditioning, a portable toilet and even an internal shower. Smaller models often carry a “porta-potty” portable toilet, and sometimes an external shower which operates within the privacy of an awning.

Picture Credit : Google

Ready mixed refers to concrete that is batched for delivery from a central plant instead of being mixed on the job site. Each batch of ready-mixed concrete is tailor-made according to the specifics of the contractor and is delivered to the contractor in a plastic condition, usually in the cylindrical trucks often known as “cement mixers.”

The biggest advantage is that concrete is produced under controlled conditions. Therefore, Quality concrete is obtained, as a ready-mix concrete mix plant makes use of sophisticated equipment and consistent methods. There is strict control over the testing of materials, process parameters and continuous monitoring of key practices during the manufacturing process. Poor control on the input materials, batching and mixing methods in the case of site mix concrete is solved in a ready-mix concrete production method. Less consumption of cement indirectly results in less environmental pollution. Ready mix concrete manufacture has less dependency on human labours hence the chances of human error is reduced. This will also reduce the dependency on intensive labour.

Picture Credit : Google

It is also known as the tipper truck which is used to transport lose materials from one place to another usually in the construction sites. The whole equipment consists of an open box part which is for the containment of the materials. The open box is attached with the hydraulics which is used for taking out the materials which is done when the ram is lifted upwards. There are different types of dump trucks, each of them designed for their specific use. Some of the types are standard dump truck, Semi-trailer end dump truck, transfer dump truck, truck and pup, Super dump truck, Semi-trailer bottom dump truck, Double and Triple trailer bottom dump truck, Side dump truck, Winter Service vehicles, Roll Off dump trucks, Off Highway Dump trucks, Haul dump trucks and Articulated hauler.

Construction projects are one of the most common uses for dump trucks. These trucks can fulfill a number of functions at a construction site, including hauling in the building materials then hauling out any torn down parts. A dump truck’s deep bed makes it a natural transporter for materials for projects like gardening or redecorating. Heavy bags of soils and large furniture like sofas or mattresses are easily moved from vendor to buyer with a dump truck, and a rented dump truck with professional driver can be a clever solution if you have a large haul and aren’t sure how to get it where it needs to go. If you’re moving, there may be tons of items and materials you need to get out of the house before leaving. Stacks of boxes in the attic that you don’t want to take with you, old bedroom furniture that is too worn out to continue using, or old gardening materials like mulch and gravel that you no longer need can be thrown into a rented dump truck and driven off to the local dump.

Picture Credit : Google