Science > Physics > Gravitation > Keppler’s Laws of Orbital Motion In this article, we shall study Keppler’s laws of orbital motion and their use to derive Newton’s law of gravitation. In the second century A.D., Ptolemy proposed a geocentric theory of the universe. According to this theory, the Earth is the centre of the universe and […]
Science > Physics > Gravitation > Variation in Acceleration Due to Gravity The acceleration of gravity is constant at a particular place but it varies from place to place. In this article, we shall study this variation in acceleration due to gravity. Variation in Acceleration Due to Gravity due to Shape of the Earth: The acceleration […]
Science > Physics > Gravitation > Acceleration Due to Gravity In this article, we shall study the concept of acceleration due to gravity and its characteristics. Also, we shall derive an expression for the same and solve some numerical problems. Weight of a Body: Weight of a body is the force with which the body […]
Science > Physics > Gravitation > Concept of Gravitational Potential In this article, we shall discuss the concept of the gravitational potential at a point in a gravitational field. It is defined as the work done in bringing the unit mass from infinity to that point without acceleration. Considering magnitude only. VG = W / […]
Science > Physics > Gravitation > Concept of Gravitational Field Intensity In this article, we shall study the concept of the gravitational field, its characteristics, the concept of inertial and gravitational mass, and numerical problems on the gravitational field. The Concept of Inertial Mass and Gravitational Mass Inertial Mass: The inertial mass of a body […]
Science > Physics > Gravitation > Numerical Problems on Newton’s Law of Gravitation In this article, we shall learn numerical problems to calculate the gravitational force of attraction between two bodies. Example – 01: Calculate the gravitational force of attraction between two metal spheres each of mass 90 kg, if the distance between their centres […]
Science > Physics > Gravitation >Newton’s Law of Gravitation In this article, we shall study Newton’s law of gravitation, its universality, and universal gravitation constant. Newton’s Law of Gravitation: Statement: Every particle of matter in the universe attracts every other particle of matter with a force which is directly proportional to the product of their […]
Science > Physics > Refraction of Light > Total Internal Reflection of Light In this article, we shall study the phenomenon of total internal reflection and its applications. Total Internal Reflection of Light and its Explanation: Let us consider a point source O in a denser medium (Water). Let XY be the boundary separating the […]
Science > Physics > Refraction of Light > Introduction to Refraction of Light Refraction of Light: When light ray travelling in one optically active medium enters another optically active medium, then the light ray deviates from its path. This phenomenon is known as the refraction of light. Laws of Refraction: The ratio of the sine of […]
Science > Chemistry > Chemical Thermodynamics and Energetics > Change in Internal Energy and Enthalpy In this article, we shall study to calculate the change in internal energy and change in enthalpy in a chemical reaction. Example – 01: For a particular reaction, the system absorbs 6 kJ of heat and does 1.5 kJ of […]