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Eye catching models at science expo

G.V.R. Subba Rao
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The ill effects of radiation caused by cell phones being demonstrated by cooking an egg, at the science exhibition organised at Gora Science Centre in Vijayawada.— Photo: V. Raju
The ill effects of radiation caused by cell phones being demonstrated by cooking an egg, at the science exhibition organised at Gora Science Centre in Vijayawada.— Photo: V. Raju

Can’t resist using a mobile phone? Don’t know how common salt can be used? Then visit the ongoing science exhibition at the Gora Science Centre here. The participants have made eye-catching models on burning issues.

A participant demonstrates how an egg gets cooked when placed for a while near a mobile phone. “The microwave radiation emitted by cellular phones is capable of modifying the proteins in the egg. Imagine what happens to our body,” says Srinivas, Naga Harsha and Nagendra of M. K. Gandhi School.

“Take a pet bottle and fill one-fourth of it with water. Pump a little air into it, and release the cap. See the bottle flying in the air,” says B. Syam of Citizen Public School.

The bottle flew because we added a little common salt, explains D. Manoj and R. Durga from the team that made the model.

Using the same principle, M.A. Arfaz and Md. Husssain of MIC College of Technology made a syringe-activated mechanical arm. Salt has a property to produce high pressure. The arm moves as the pressure in the syringe is managed. This principle would help avoid using chemicals and reduce pollution, they explain.

Ch. Ramya, Deepika Rani and Sreeja fabricated a cross section of helicopter. “The blades move faster but for safety of visitors, they are not running now,” they say apologetically.

Sound and light are always an attraction. A light can be switched on with the sound of a clap. This will be helpful in godowns and the likes as a person entering it in the dark would not know where the switches are,” says Joginder Singh of Citizen Public School.

Another student of M.K. Gandhi School, P. Surya explains that used automobile lubricants oil could be used for cleaning the surfaces. It is cost-effective compared to surface cleaners available in the market.

The scientific explanation for idols of Lord Ganesh drinking milk, a working model of Linear Induction Motor-based locomotive, robots and a vanishing toy were some of the other attractions.


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