Dr Rajiv Desai
An Educational Blog
ELECTRICITY
ELECTRICITY: _ The picture above shows how a barber cuts hair during recent power failure in India. _ Prologue: Electric crematoria were snuffed out with bodies inside, New Delhi’s Metro shut down and hundreds of coal miners were trapped underground after three Indian electric grids collapsed in a cascade on 30th and 31st July 2012, cutting power to 620 million people in India. The blackout engulfed as many as 19 of India’s 28 states on July 31, with more than 100 intercity trains stranded and traffic lights went out in busy roads, causing widespread jams. Without question, it was the largest blackout in world history. Hospitals, factories and the airports switched automatically to their diesel generators during the hours-long cut across half of India. Many homes relied on backup systems of invertors with batteries. On the other hand, millions of India’s poorest had no electricity to lose. Of the […]
THE CYCLONE
THE CYCLONE: _ _ Prologue: I am not fond of weather analysis. Many times I inadvertently watch weather forecast on TV which I find quite boring. Nonetheless, after discussing earthquakes and tsunamis, I felt that I should discuss adverse weather events which also affect our lives. A storm is any disturbed state of atmosphere, and strongly implying severe weather; marked by strong wind, thunder, lightning and heavy precipitation (rain, ice etc). Storms are created when a center of low pressure develops, with a system of high pressure surrounding it. This combination of opposing forces can create winds and result in the formation of storm clouds. Storms generally lead to significant negative impacts to lives and property. The vertical wind shear in thunderstorm can cause airplane crashes. Severe weather is also responsible for plenty of helicopter crashes, and delay launch of space shuttles. There are various types of storms including tropical […]
