Category Archives: Videos

How ATM works

Automated teller machine or ATM also known as cash machine gives you money whenever you need. You just insert a plastic card, enter a pin number and the machine delivers the exact amount you asked for. But what goes inside the machine? Cash machine connects to a central data processor where your account details are… Read the rest

First moon landing

Watch the video of first moon landing on July 20, 1969. It was NASA’s Apollo 11 mission which started the beginning of a new era, in Neil Armstrong’s words it was “one small step for man, one giant step for mankind”.… Read the rest

Make a basic electric motor

Electric motor converts electrical energy into mechanical energy. To understand the working principle you can build a simple motor at home. For this experiment you will need thin insulated wire, battery, paper clip or safety pin, tape, scissors, crocodile clip and adhesive tape. First video is very simple; it shows how to build simple motor… Read the rest

Why do we put salt on icy road instead of heating?

Instead of heating we use salt to melt snow. Because snow will continue to fall on road and freeze again, but salt decrease freezing point and prevents forming of ice. Usually table salt sodium chloride is used but calcium chloride is twice effective than sodium chloride and used in countries like Russia. Do you know… Read the rest

Washing hair in space

Every astronauts floats like superheroes in the weightless environment of space station. Not only astronauts everything including water floats there, so without running water washing hair isn’t easy. In this video astronaut Karen Nyberg shows how she washes her hair with shampoo in space. It’s different and tricky.… Read the rest

Lemon battery

Making a lemon battery is very easy. Lemon contains citric acid and with the help of citric acid two different metals can generate electricity. You will need lemon, copper coin, zinc coated nail, crocodile clip, multimeter and a LED to make battery. It can be a science fair project also. So watch this hilaroad video… Read the rest

Sleeping in space

How do astronauts sleep in space? It’s little different. Astronauts feel virtually weightless there and a sleeping astronaut may float away from one end of space station to other end. So they sleep inside a sleeping bag which is attached to the space station. Astronaut Chris Hadfield explains in this video.… Read the rest

Battery from coin

It’s a very simple experiment to generate electricity from copper coins and I bet you will enjoy. This copper coin battery can light LED, can power your TV remote controller. Along with ten copper coins you will need cardboard, foil, vinegar, salt water, scissors, plastic tape and a LED to check whether your battery is… Read the rest

Build your own windmill

Windmill can convert wind energy into rotational energy and eventually this rotational energy can be converted to electricity. Rotating windmill rotates an electric generator from where electricity is generated. It’s a simple experiment video by hilaroad to show how you can make a windmill and calculate its power.… Read the rest

Are MRIs safe?

Ionizing radiation like X-ray can be harmful. But to date no study has claimed that MRI is harmful. Instead of radiation a giant magnet is used to take image of body parts inside which may be your brain, heart or anything. One danger of MRI is its strong magnet attracts metal. So technicians ensure no… Read the rest