time zone difference

When metals are required in a ultra pure state, the zone refining method is used. The principle-employed states that the impurities, which lower the melting point of a metal remain preferentially dissolved in the liquid phase and purer metal will emerge in the solid phase. In actual prac..

The line graphs show the variation in temperature during day and night times in four different cities at the same time. Which city recorded the minimum night time temperature? => Fort Wayne or Fargo or Erie or Lexington..

Air is a Mixture of Different Gases - In earlier times Air was considered as an Element but it was found out to be a mixture. The following are the reasons for considering air as mixture and not an element or a compound. a) Air has a variable composition and hence it cannot be r..

Velocity of Sound in Different Gases - As seen from equation (1-28), the velocity of sound in a gas depends on g , the ratio of the principle specific heats of the gas. This, in turn, depends on the atomicity of the gas. An approximate equation connecting g and the degrees of freedom is W..

Simple Pendulum Time Period of Oscillation Varies with Time - Let us now find out how Time Period of oscillation vary with time. Set up a simple pendulum and measure the time taken for 10 oscillations of the simple pendulum for different l..

The scatter plot represents the times taken by Andy to cover different distances. What was the time taken to cover the total distance? => 20 sec or 30 sec or 10 sec or 40 sec..

The area of a rectangular plot is 11 times its width. What is its width, if the difference between the length and the width is 7 ft? => 5 ft or 4 ft or 6 ft or 3 ft..

The price of an egg is increased by 40% in three years time. Find the difference in the price if an egg costs 15 cents initially. => 45 cents or 6 cents or 21 cents or About 11 cents..

Which scatter plot shows the negative relationship between the times taken to reach City A from City B at different speeds? => Graph 3 or Graph 1 or Graph 4 or Graph 2..

The principle of homogeneity of dimensional equation is used to derive a relation between various physical quantities. To derive a physical relation, the dependent factors of a given physical quantity is found. Assuming its dimensions in terms of these factors, the final dimensional equation is wri..