Write duration of lubb and dub.

Write the fractions

Write HVZ reaction.

In human beings,the duration of cardiac cycle is:

If the earth suddenly contrats to half of its original size without any change in mass,the new duration of the day would be :

A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be the same?

A long solenoid of 10 turns / cm has a small loop of area 1 sq. cm placed inside with the normal of the loop parallel to the axis. Calculate the placed across the small loop if the current in the solenoid is changed from 1 A to 2 A in 0 .1 s, during the duration of this change.

If the ice on the polar caps of the earth melts, how will it affect the duration of the day? Explain.