Electric shock is a condition that occurs when there is a flow of electricity current through that body. If an electric current passes through the human body, muscles are stimulated. If the muscles that open the figures and extend the limbs away from the body are tetanized, the victim is propelled away from the current source, sometimes as much as few meters. A current of more than 10mA causes sustained contraction of the flexors, that is, the muscles that close fingers and draw the limbs towards the body. The victim thus cannot let go of the source of current. Resource Person-Mr. Navodana Kankanamge, B.Sc. (Electrical Engineer)
When getting an electric shock sometimes people stick to the surface and sometimes people are thrown away. Why is that?
Graphite can be transformed into diamond by applying a temperature of 3000°C and pressure of 100,000 atm.
The Earth spins at 1,000 mph but it travels through space at an incredible 67,000 mph.
Only half of 1% of your genetic code is unique to you. The rest is common for every human.
Light through water travels at about 220,000,000 m/s. A raindrop is travelling at about 10 m/s. When the light crosses a raindrop, the drop falls less than 1 nanometer. Compared to sunlight, raindrop is basically still. Although the light is dragged along with the raindrop somewhat, it doesn’t cause any noticeable effects. 23/09/2013
Since a water droplet is in motion, how come we see a still rainbow?
The first ten feet of ocean hold as much heat as the Earth’s entire atmosphere.
During an average lifespan, a human spends 6 years dreaming, that’s more than 2,000 hrs of imagery through your brain.
The brain produces several hormones when we are in a stress condition. Keeping these hormones in the brain can harm the normal brain activities. The lachrymal glands get stimulated and produce tears to provide medium for these hormones to get dissolved and exit our body through eyes.
Why do tears fall when crying?
Researchers have used the shape of DNA to assemble a transistor using graphene. They predict that this change can lead to produce faster microchips for mobile devices in future.
The opposite sides of a dice cube always add up to seven.
While Usain Bolt completes 100 meters run in 9.58 seconds, the fastest animal on Earth, Peregrine Falcon will finish it in just 1.1 seconds.
When the fingers are in contact with water for a long time, water enters to the cells of fingers by Osmosis. The cells in the skin swells when water enters.This gives a wrinkled appearance to fingers.
Why does the skin of fingers and toes wrinkle when they are left in water for a long time?
Those who smoke a pack of cigarettes a day drink half a cup of tar a year.
Fleas can jump 200 times their own height.This is equal to a man jumping 4 times the height Bank of Ceylon building,Colombo(105m).
Coral reefs occupy less than 0.1% of the world’s ocean surface. This is about half the area of France.
Both Kilograms and Moles are used to measure the amount of matter in a given substance. The reason why we need both depends on the purpose we use them.Measuring Mass in kilograms is commonly used in day to day life work. Measuring the substance in the means of moles is useful in Chemical applications.