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

How does refraction of light affect the length of the day?

When the population of Nostoc and Anabaena are increased in water-logged fields, how will if affect the field? Explain with reason.

How does rate of development affect the environment ? Explain

If an earth's satellite is put in an orbit at some height h,where the resistance due the atmosphere cannot be neglected,how will the motion of the satellite be affected?

Earth can be thought of as a sphere of radius 6400 km.Any object (or a person) is pewrforming circular motion around the axis of the earth due to the earth rotation (period 1 day). What is acceleration of object on the surface of the earth (at equator) towards its centre? What is it at latitude theta ? How does these acceleration compare with g = 9.8 m//s^(2) ?

Explain how sexual reproduction gives rise to more vialbe variation than asexual reproduction how does this affect the evolution of those organisms that reproduce sexually?

A wheel with 8 matallic spokes each 50 cm long is rotated with a speed of 120 rev//mi n in a plane normal to horizontal component of earth's magnetic field. Earth's magnetic field at the phase is 0.4 G and angle of dip 60^(@) . Calculate the emf induced between the axle and rim of the wheel. How is the emf affected if number of spokes is increased ?