Science > Physics > Units and Measurement > Measurement of Length, Area, and Volume > Distances of Heavenly Bodies from the Earth In this article, we shall study the parallax and other methods to find the distance between two heavenly bodies. Parallax: Hold a pencil vertically in front of you at a certain distance against […]
Science > Physics > Semiconductors > Introduction Semiconductors are the substances whose conductivity lies between the conductors and insulators e.g. Germanium, Silicon, etc. These elements are members of the fourth group of the periodic table with valency 4. These elements have a partially filled conduction band and partially filled valence band. There are no free […]
Science > Physics > Semiconductors > PN Junction Diodes When a crystal of semiconductor is doped such that half the portion of the crystal is doped with a trivalent impurity and the other half is doped with a pentavalent impurity, then the junction (boundary) formed is called a PN junction. The crystal itself is called […]
Science > Biology > Digestion and absorption in Human > Gastric Glands The gastric glands are numerous, simple or branched tubular glands present in the mucosa of the stomach. They are located in different regions of the stomach. Gastric glands secrete digestive juice and mucus. There are three types of gastric glands, distinguished from one another […]
Science > Biology > Digestion and absorption in Human > Salivary Glands There are two sources of digestive enzymes: The glandular cells of the lining of the stomach and intestine, which directly pour their secretion into the lumen of the gut or the alimentary canal. Special glands such as the salivary glands, the liver and the […]
Science > Physics > Oscillations: Simple Harmonic Motion > The Vibration of Vertical Spring In this article, we shall study the vibration of vertical spring, when a mass is attached to it. Oscillation of Mass Due to a Vertical Spring: Let us consider light and elastic spring of length L suspended vertically from a rigid […]
In this article, we shall study to solve numerical problems based on simple pendulum. Science > Physics > Oscillations: Simple Harmonic Motion > Numerical Problems on a Simple Pendulum Example – 01: The period of oscillation of a simple pendulum is 1.2 sec.in a place where g= 9.8m/s2. How long is the bob below the […]
Science > Physics > Oscillations: Simple Harmonic Motion > Theory of Simple Pendulum In this article, we shall study a concept of a simple pendulum, its characteristics. We shall also derive an expression for the period of a simple pendulum. A simple pendulum consists of a point mass suspended from a perfectly rigid support by […]
Science > Physics > Oscillations: Simple Harmonic Motion > Composition of Two SHM In this article, we shall study the composition of two SHM. Sometimes particle is acted upon by two or more linear SHMs. In such a case, the resultant motion of the body depends on the periods, paths and the relative phase angles […]
Science > Physics > Oscillations: Simple Harmonic Motion > Numerical Problems on Energy of Particle Performing S.H.M. In this article, we shall study to solve numerical problems to calculate potential energy, kinetic energy, and total energy of particle performing S.H.M. Example – 01: A particle of mass 10 g performs S.H. M. of amplitude 10 […]