Is Matter Around Us Pure? A pure substance is made up of only one type of particle and has uniform composition and properties. Common examples include sodium chloride and sugar. A mixture is a combination of two or more substances, where the individual components retain their own properties. Examples include air, soil, and sea water. […]
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Work Energy And Power Work – when a force is applied to an object and object moves in direction of force. Formula: Work = Force × Distance × cos(θ), Unit: Joules (J) Energy – The capacity to do work. There are many forms (kinetic, potential, thermal, etc.). Unit: Joules (J) Power – The rate at
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Physics Practice Questions – Unit and Measurement We keep updating questions here from time to time. Please visit this page every alternate day. Q1. In the following which is the fundamental physical quantity ? (a) Force (b) Velocity (c) Electric Current (d) Work Q2. The Unit of electric power is – (a) Joule (b) Volt (c)
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Measuring Instruments and Scales play a crucial role in obtaining accurate and reliable data. These tools help scientists and researchers quantify various physical quantities and parameters. Here are some common measuring instruments and scales used in general science : Sonar (Sound Navigation And Ranging) with the help of sonar, high frequency ultrasonic waves are sent
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Resistance (R) : any conductor that opposes the flow of electric current through it and depends on the shape and size of the materials, temperature, and nature of the materials is called resistance (R). R = ρL/A where ρ – resistivity, L – length and A – area of the cross-section. The SI unit of
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Astronomical distances, especially the distances between planets and stars, are so huge that they are measured in miles and kilometers. Expressing these in units can be extremely difficult, so they can be measured in AU (Astronomical Units), light years, parsecs, etc. The speed of light is constant throughout the universe and it is known for
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Physical and Fundamental quantity A quantity that can be measured is called a physical quantity. Fundamental quantities are those which cannot be expressed or measured in terms of other physical quantities. Scalar and Vector quantity Physical quantities which have magnitude only and no direction are called scalar quantity. Physical quantities that have magnitude and direction
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Physical and Fundamental quantity A quantity that can be measured is called a physical quantity. Fundamental quantities are those which cannot be expressed or measured in terms of other physical quantities. Scalar and Vector quantity Physical quantities which have magnitude only and no direction are called scalar quantity. Physical quantities that have magnitude and direction
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