Science Facts/Education

BNT162b2, a novel COVID-19 vaccine is in ongoing trials. It has been shown to have about 95% efficiency. It is developed by BioNTech and Pfizer.

Let's hope it gets approved!

Fear

Technical terms
Atom : smallest particle of an element containing electron,proton
Proton : sub atomic particle with unit mass and unit positive charge found in nucleus of an atom.
Candela : SI unit of luminous intensity
Carbon-14: Isotope of carbon-12 having atomic mass 14 and is radio active
Celsius : a unit of temperature in which freezing point of water is taken as 0c and boiling point of water is taken as 100c
CGS : a system of unit in which length is measured in centimetre, mass in gram and time in second
Crystal : a natural particle of a substance with smooth surfaces meeting at sharp edge to form a fix geometrical shape such as crystal of iodine.
Density : mass of unit of volume of substance.
Derived unit : a unit which is derived from basic units.
Electron : sub-atomic particle with unit negative charge, mass equal to 1/1837 of proton mass and is found in the orbit of an atom.
Electromagnetic radiation : a kind of radiation producing electromagnetic waves of varying wave lengths.
Fossil : remains of ancient pllants and animals found in sedimentary rock.
FPS : as ystem of unit in which length is mesaured in foot, mass in pound and time in second.
Frequency : number of waves or cycles produced in unit time
Fundamental unit : units which are idependent of other units.
Iridiumm : a kind of metal which does not rust
Kelvin : SI unit of temperature used in science. Its value is degree Celsius +273. eg 10C is equal to 273+10=283K
Krypton-86: an isotope of krypton and is radio-active element.
Mass : amount of matter contained in a bodu and is depended upon the total no. of proton neutron and electron.
MKS: a system in which length is measured in metre mass in kilogram and time in second
Mol : SI unit of amount of substance
Neutron : sub atomic particle with unit mass but zero change and found in the nucleus of an atom.
Nucleus : central and condensed part of an atom , it contains proton and neutron.
Oscillation : to and fro motion of pendulum
Pendulum : a heavy bob supsended with a string and used to measure the time period of oscillation.
Platinum : a kind of metal more precious than gold which has density higher than gold.
Prototype : the first model designed from which other forms are copied
Quartz : a crystalling material mineral made up of silica.
Radioactive decay : a process of disintegrating mass of a radio active element producing radiation. In the long run the element changes to other element
SI units : System of international units created in 1960. Agreed by the international convension of scientist held in France in 1968.
Solar day: a time period of one complete rotaion of the earth in relation to sun.
Standar meter : scale,length of which is internationally accepted as one metre.
STP: full form of Standard Temperature and Pressure in which the value of temperature is 0c and that of pressure is 760 mm of HG.
Sundial : a kind of clock, which counts the time by movement of shadow tip of the rod kept in it.
Universe : space in which all the stars planets,nebula and all other heavenly body exist.
Acceleration : change in velocity per unit time
Aceleration due to gravity: rate of change of velocity of a free falling body due to gravity of earth.
Alternating current : curent that changes polarity frequently with time.
Atmosphere : the layer of air covering the earth
Avergae velocity : total distance covered per unit time in a particular direction
Deceleration : to decrease velocity per unit time
Displacement: distance covered in a particular direction
Force : push or pull
Frequency : number of cycle per second
Friction : resistant to motion
Gravity : pulling force of a planet to the object on it
Gravitation : phenomenon of attraction beetween two heavenly body by virtue of their masses
Gravitational force : force of attraction beetween any two bodies
Gravitational field. : force of attraction exerted by a planet on unit mass.
Inertia : tendency of a body to resist the change in motion o by virtue of mass
Mass : amount of matter contained in a body
Motion : change in position with time
Oscillation : to and fro motion of a pendulum
Parallelogram law : a law used to find out the resultant of two forces or velocities acting on a point with certain angle.
Retardation : decreasing velocity with time
Scalar quantitiy : quantity which ahas only magnitude
Space : universe beyond atmosphere of the earth
Space ship : a vehicle of space
Speed : distance covered per time
Ticker timer : a instrument used to mark interval
Vector : quantity having magnitude and direction
Weight : force of attraction exerted by the earth on a body.