Physics -Important Basics Scalars and Vectors Scalars- Scalar quantities are those quantities which require only the magnitude for their complete specifications. Some physical quantities which are scalar are mass, length, time, energy, volume, density, temperature, electric charge, electric potential etc. Vectors- Vector quantities are those quantities which require magnitude as well as direction for their … Read more
Physics 1-The world geothermal comes from Greek words meaning ‘Earth’ (geo) and ‘heat’ (thermos). 2-Sound can’t travel through a vacuum (an area empty of matter). 3-The speed of sound is around 767 miles per hour (1,230 kilometres per hour). 4-When traveling through water, sound moves around four times faster than when it travels through air. … Read more
Physics 1-Light travels at exactly 299,792,458 metres per second in a vacuum (about 300,000 kilometres per second or just over 1 billion kilometres per hour). 2- light takes 0.0000033 seconds to travel 1 kilometre. 3- Light takes 8.32 minutes to reach us from the Sun. 4- Light takes 1.3 seconds to reach us from the … Read more
Physics 1- The audible frequency range is frequency between 20Hz to 20000Hz 2- Coulomb is the unit for electric charge 3-Newton second per square meter is the unit for Viscosity. 4-The value of acceleration of a body moving with constant velocity is zero. 5-The Electric circuit which changes its direction at regular intervals of time … Read more
Physics 1- Universe -The Universe is everything that exists on celestial bodies and the space between them. 2- Galaxy – A group of stars is called a galaxy. 3-Asteroids – A large number of small bodies revolve around the sun between Mars and Jupiter are called Asteroids. 4-The mass of the Jupiter is 318 times … Read more
Physics – Force 1- Force -It is a physical quantity which changes or tend to change the position of a body. 2-If there is physical contact between the two bodies which are interacting then the force applied is called Contact force. 3-Muscular force, force of friction, normal force , tension are examples of contact force. … Read more
GK -Physics 1-A perfect black body is one which absorbs heat radiations of all wave lengths falling on it 2-The highest thermal diffusivity is of LEAD. 3-During a refrigeration cycle, heat is rejected by the refrigerant in a condenser. 4-Thermal conductivity of water may increase or decrease depending upon temperature with rise in temperature. 5-The … Read more
Lights -Facts 1-The study of properties and behaviour of light is known as Optics. 2-Holography -Three dimensional imaging using interference of light 3-Colour of light with longest wavelength is Red. 4-Colour of light with smallest wavelength is violet. 5-Blue light is most conducive to photosynthesis. 6-Rainbows are formed due to dispersion of light. 7-Beautiful colours … Read more
Science Miscellaneous Questions With Answers 1.A weather balloon is not fully inflated on the ground because– (A) if the balloon is fully inflated, it may not remain stable in a storm (B) the air inside the balloon expands as it rises and may burst (C) it cannot withstand the outside pressure if fully inflated (D) … Read more
General Awareness -Physics- Synthetic Fibres and plastics 1-Synthetic fibres are made of very large units called polymers. Polymer 2-Rayon is … Read more