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Gaia hypothesis (J. Lovelock, 1969):
The idea that as a whole Earth should be regarded as a living organism & that biological procedure stabilize the environment.
A concentric tube heat exchanger is comprised of a thin wall inner tube of 25.4 mm diameter and an outer tube of 47 mm diameter. The heat exchanger is used for cooling lubricating
A figure separated into squares, each of size 1 mm 2 is being viewed at a distance of 9cm by a magnifying lens of local length 10cm, held close to the eye. (i) Illustrate a ray
What does held nucleons together in a nucleus? Nuclear force. It is the nuclear force which fasten the nucleons together and is responsible for the stability of nucleus.
Ionisation: If the amount of external energy is large enough the valence electron can gain sufficient kinetic energy (energy of movement) to be removed completely from its atom
Calorimetry is the act of calculating the heat of chemical reactions or physical changes, or the science of making such measurements. Calorimetry is performed with a calorimeter. T
(UNIFORM VELOCITY) (i) When instantaneous velocity and average velocity of a body are equivalent, then the body moves with uniform velocity. (ii When instantaneous velocity
find the kinetic energy of a proton whose debroglie is 1fm
Electrical work: Electrical work is done if a quantity of charge (coulombs) is moved between two points which are at different electrical potentials. The SI unit of work
Demonstrating how the angle of the sun's rays changes from day to day at the same hour Cut a 1-cm round hole in a piece of paper or cardboard. Place this in a south window of y
A bucket of water is suspended from a ?xed point by a rope. The bucket is set in motion and the system swings as a pendulum. Though, the bucket leaks and the water slowly ?ows
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