In a state of weightlessness, the shape of a candle flame will be spherical. Without the influence of gravity, convection currents do not form, causing the flame to become spherical as it is no longer pulled upwards. This phenomenon is ...
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The liquid rises to a higher height than water in a capillary tube because the surface tension of the liquid is higher than that of water. This stronger surface tension pulls the liquid upward, resulting in a greater capillary rise ...
The movement of water from the roots of the plant towards its foliage is not solely due to capillarity. While capillarity contributes to water uptake by plants, other processes like transpiration and root pressure also play significant roles in the ...
The universal law of gravitation was propounded by Newton. Newton formulated this law in his work “Philosophiæ Naturalis Principia Mathematica” published in 1687. It describes the gravitational force between two objects and is a fundamental principle in classical mechanics and ...
The reason for water droplets not sticking to oily surfaces is primarily due to the lack of adhesive force. Water and oil have different polarities, resulting in weak adhesive forces between them, preventing water droplets from adhering to oily surfaces ...
Found in a substance like a rubber mattress when its shape changes, stored energy refers to the potential energy stored within the material due to deformation. This stored energy enables the material to return to its original shape once the ...
Electrical energy is produced by converting solar energy using photovoltaic cells. Photovoltaic cells directly convert sunlight into electricity through the photovoltaic effect. When sunlight hits the cells, it excites electrons, generating a flow of electricity.
Dynamo converts mechanical energy into electrical energy. Rotating coils within a magnetic field induce an electromotive force, generating electrical current. This process is based on electromagnetic induction.
Energy is produced in the Sun by nuclear fusion. In the Sun’s core, hydrogen nuclei fuse to form helium nuclei, releasing immense amounts of energy in the process. This fusion reaction powers the Sun and generates the heat and light ...
Food gets cooked in less time in a pressure cooker because high pressure increases the temperature of boiling water. The elevated pressure inside the cooker raises the boiling point of water, allowing food to cook at higher temperatures, thereby reducing ...