The initial increase of magnetic field in magnetic storms is caused
Options: when the shock wave, associated with the gusty solar wind, compresses the magnetosphere, when there is a large decrease in field intensity, when the gust wind itself engulfs the magnetosphere, None of the above
What is the purpose of 'United Nations Conference on Trade and Development' (UNCTAD)?
Options: Promotes International Trade with a view to accelerate economic growth of developing countries, Promotes International Monetary co-operation & expansion of International Trade, Set rules for World Trade, None of the above
The Latin word formica means ant. The name formic acid is derived from this Latin word because
Options: this acid, in ancient times, was used to eliminate ant-hills, this corrosive acid is secreted by ants to drive away their enemies, this acid was first obtained by the distillation of ants, ants are attracted by the odour of this acid
Options: acts of gallantry in the presence of enemy, gallantry by children, outstanding contribution to literature, the most conspicuous bravery or self sacrifice on land, air or sea but not in the presence of the enemy
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
Options: 1.8 km, 0.15 km, 2.2 km, 0.20 km, 2.8 km, 0.25 km, 3.3 km, 0.30 km
William Frederick is credited with the invention of the modern frisbee in the mid 1950's. In 1957 the Wham-O Company bought his idea and the rest is history. They named the toy after William Frisbie who was a ________?
Options: Pie maker, Owner of a pizza parlor, Student at Yale, Ceramic plate designer
On a night when the sky is clear, the temperature may dip considerably; on a cloudy night the temperature will usually dip much less. The reason for this difference is that
Options: the clear sky allows radiant energy to escape readily from the earth, on a cloudy night the clouds are warm and therefore retard the cooling, the clear sky allows the cold of outer space to reach the earth, current of air carry the heat away from the earth on a clear night