Question

Jordan, Banneker baseball's record holder for stolen bases, approaches third base. He dives head first, hitting the ground at 6.75 m/s and reaching the base at 5.91 m/s

Answer 1

Answer:

The stratosphere ozone (o3) is a product of billions of years of the photochemical process catlalyzed by the solar radiation . The ozone screen provides a shield for living creatures by filtering out dangerous ultra-violet rays from sunlight . ultra violet radiation causes sun burn , skin cancer , cataracts and can suppress the immune system . Since 1973 it has been increasingly recognized that the ozone umbrella is being ripped off by the industrial activities of man which release chemicals like chlorofluorocarbons (CFC’s)

The main problem with the CFC’s is their long life in the atmosphere ranging from 75 to 125 years . Also one molecule of CFC can destroy 1,00,000 molecules of ozone .

Also rockets which take off vertically carry ozone killers (Chlorine containing chemicals and nitrogen oxides )

Eg : The American Delta booster, the author’s rate it as a second ozone killer which destroys 8 million tonnes of the earth shielding gas during every take-off

SOLUTION –

Coming to the question of stopping launchings of space ships to obviate thinning of the ozone layer , the soviet experts are of the view the problem can be tackled by taking positive steps like minimizing production of ozone-killing chemicals , banning solid fuel fired rockets , and setting international restrictions for the frequency of launches .