How can you find the mass of earth, starting from the law of gravitation?

Arrange the followign in the sequence in which you would find them in a plant starting from the periphery: Epidermis, Pith, Endodermis, Cortex.

how can you define temperature in thermodynamics ?

How can you increase the reduction potential of an electrode?

Define osmotic pressure. How can molar mass of a substance be determined from the measurement of osmotic pressure of a solution?

How Kepler's third law derived from Newton's universal law of gravitation.

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

A rocket is fired from the earth towards the sun. At what distance form the earth's centre is the gravitational force on the rocket zero? Mass of the sun = 2 xx 10^20 kg and mass of earth = 6 xx 10^24 kg and orbital radius 1.5 xx 10^-8 km.

How can you determine the resolving power of your eye?

How will you find the work done when a variable force acts on a body?