Vilasnandanpawar

Energy is the ability to do work. It exists in different forms (kinetic, potential, heat, light, etc.). Energy cannot be created or destroyed (law of conservation of energy). It can be transformed from one form to another. SI unit of energy is joule (J). Energy is a scalar quantity (no direction). It can be stored and transferred. Total energy of a

Work and energy are essential concepts in physics that describe how forces cause motion and how the ability to perform tasks is transferred or transformed. Work is said to be done when a force is applied to an object and it results in displacement in the direction of the force. Energy is the capacity to do work and exists in various forms, such as kinetic energy (energy due to motion) and potential energy (stored energy due to position or condition). When work is done on an object, energy is tra...

The chapter “Is Matter Around Us Pure?” from NCERT Science Class 9 explains that most substances around us are not pure but exist as mixtures of different components. A pure substance is made up of only one type of particle, such as elements (like oxygen or gold) or compounds (like water), and has fixed properties. In contrast, mixtures contain two or more substances physically combined and can be homogeneous (uniform, like salt solution) or heterogeneous (non-uniform, like sand in water). T...