Work done per unit time

Define longitudinal stress and longitudinal strain and show that work done per unit volume of a stretched wire is (1)/(2) "stress" xx "strain".

The work done per unit volume to stretch the length of area of cross-section 2 mm^2 by 2% will be [Y= 8xx10^10N//m^2]

Rate of increase in biomass by heterotrophs or consumers per unit time and area is known as :

Total number of individuals of a species per unti area and per unit time is called

Measurement and the comparison of total growth per unit time is known as

The work done in turning a magnet of magnetic moment 'M' by an angle of 90^(@) from the meridian is 'n' times the corresponding work done to turn it through an angle of 60^(@) , where 'n' is given by

The work done in turning a magnet of magnetic moment 'M' by an angle of 90^(@) from the meridian is 'n' times the corresponding work done to turn it through an angle of 60^(@) , where 'n' is given by

Work done in time t on a body of mass m which is accelerated from rest to a speed v in time t_(1) as a function of time t is given by

When the quantity of a radioactive substance is increased two times, the number of atoms disintegrating per unit time is

If X is the total number of collisions that a gas molecule registers with other molecules per unit time under particular conditions, then what is the collision frequency of the gas containing N molecules per unit volume is ?