Hello Readers,
We shall discuss “Important Scientific Laws and Theories” Now a days these topics have became an important part of the General Science test in not only SSC but also FCI Exams.
1. Archimede’s principle – It states that a body when wholly or partially immersed in a liquid, experiences an upward thrust which is equal to the weight of the liquid displaced by it. Thus, the body appears to lose a part of its weight. This loss in weight is equal to the weight of the liquid displaced by the body.
2. Aufbau principle – It states that in an unexcited atom, electrons reside in the lowest energy orbitals available to them.
2. Avogadro’s Law – It states that equal volumes of all gases under similar conditions of temperature and pressure contain equal number of molecules.
4. Brownian motion – It is a zigzag, irregular motion exhibited by small solid particles when suspended in a liquid or gas due to irregular bombardment by the liquid or gas molecules.
5. Bernoulli’s principle – It states that as the speed of a moving fluid, liquid or gas, increases, the pressure within the fluid decreases. The aerodynamic lift on the wing of an aeroplane is also explained in part by this principle.
6. Boyles’s Law – It states that temperature remaining constant, volume of a given mass of a gas varies inversely with the pressure of the gas. Thus,
PV = K (constant), where, P = Pressure and V = Volume.
7. Charles’s Law – It states that pressure remaining constant, the volume of a given mass of gas increases or decreases by 1/273 part of its volume at 0 degree celsius for each degree celsius rise or fall of its temperature.
8. Coulomb’s Law – It states that force of attraction or repulsion between two charges is proportional to the amount of charge on both charges and inversely proportional to the square of the distance between them.
9. Heisenberg principle (uncertainty principle) – It is impossible to determine with accuracy both the position and the momentum of a particle such as electron simultaneously.
10. Gay-Lussac’s Law of combining volumes – Gases react together in volumes which bear simple whole number ratios to one another and also to the volumes of the products, if gaseous — all the volumes being measured under similar conditions of temperature and pressure.
11. Graham’s Law of Diffusion – It states that the rates of diffusion of gases are inversely proportional to the square roots of their densities under similar conditions of temperature and pressure.
12. Kepler’s Law – Each planet revolves round the Sun in an elliptical orbit with the Sun at one focus. The straight line joining the Sun and the planet sweeps out equal areas in equal intervals. The squares of the orbital periods of planets are proportional to the cubes of their mean distance from the Sun.
13. Law of Floatation – For a body to float, the following conditions must be fulfilled:
(A) The weight of the body should be equal to the weight of the water displaced.
(B) The centre of gravity of the body and that of the liquid displaced should be in the same straight line.
14. Law of conservation of energy – It states that energy can neither be created nor destroyed but it can be transformed from one form to another. Since energy cannot be created or destroyed, the amount of energy present in the universe is always remain constant.
15. Newton’s First Law of Motion – An object at rest tends to stay at rest, and an object in motion tends to stay in motion, with the same direction and speed in a straight line unless acted upon by some external force.
16. Newton’s Second Law of Motion – The rate of change of momentum of a body is directly proportional to the force applied and takes place in the direction in which the force acts.
17. Newton’s Third Law of Motion – To every action there is an equal and opposite reaction.
18. Newton’s Law of Gravitation – All particles of matter mutually attract each other by a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
19. Ohm’s Law – It states that the current passing through a conductor between two points is directly proportional to the potential difference across the two points provided the physical state and temperature etc. of the conductor does not change.
20. Pauli exclusion principle – It explains that no two electrons in the same atom or molecule can have the same set of quantum numbers.
21. Raman effect – It is the change in wavelength that occurs when light is scattered by the atoms or molecules in a transparent medium.
22. Tyndall effect – The scattering of light by very small particles suspended in a gas or liquid.
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:Uses of Concave Mirrors:
1–Used by doctors to focus light inside the ears, mouth and throat.
2–Used as shaving mirrors to see an enlarged view of face.
3–Used as reflectors in torches and vehicle headlights to form powerful beams
:Uses of Convex Mirrors:
1–Used in driving mirror to give a view of the traffic behind.
2–Used at blind corners of roads/driveways to enable vehicles to see the traffic around the corner.
:Uses of Convex Lens:
1–Used in magnifying glass.
2–Used to correct the vision of longsighted persons.
:Uses of Concave Lens:
1–Used in spy holes on doors to check the visitors.
2–Used to correct the vision of shortsighted persons.
:Uses of Plane Mirrors:
1–Used as looking glass.
2–Used in periscope used in ships, aircraft etc.
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1.
Contemptuous – showing contempt; scornful.
2.
Adorn – make more beautiful or attractive. Decorate
3.
Fatuous – silly and pointless. silly, foolish,
stupid
4.
Board -get on or into (a ship, aircraft, or
other vehicle).
5.
Exasperate – irritate intensely; infuriate.
6.
Skin in the game – A person who has skin in the
game has invested in the company they are running.
7.
Devolve – transfer or delegate (power) to a
lower level, especially from central government to local or regional
administration.
8.
You can lead a horse to water (but you can't
make him/it drink) – something that you say which means you can give someone
the opportunity to do something, but you cannot force them to do it if they do
not want to
9.
Tempting (adj.) – appealing to or attracting
someone, even if wrong or inadvisable.
10. take
on – admit, adopt, undertake, meet
11. Proponent
– a person who advocates a theory, proposal, or project. Supporter
,Promoters
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whats Pascal's law???
what principle/law explains the working of hydraulic brakes in automobiles???
Persons of indian origin(PIO) from which country among the following is proposed to be considered for dual citizenship of india?
A) Fiji B) U.S. C) Zimbabwe D)Sri Lanka..
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Pascal's law
Pascal's law
Somebody plz tell me..how can we save this topic..I have tried many time..couldn't do so..
Pascal law
When pressure is applied at a point in static fluid,pressure distribute equal in all the direction in horizontal plane.
just copy and paste in ur word doc and save it.simple.