Centripetal force (Fc) is the force required by the body of mass m to hold in circular motion at a distance of R, from the centre of the circle at velocity v. If a body travels around a circle at constant speed, the velocity is changed by direction. So, the body experiences an acceleration that … Read more
Chain reaction in physics is a process that generates products that cause more processes of the same nature, a self-sustaining sequence. The most typical case of Chain reaction is nuclear fission caused by neutrons. Chain reactions are usually very fast, but are also highly sensitive to reaction conditions, possibly because the substances that support the … Read more
In physics, the centre of mass distribution in space is the distinctive point where the weighted relative position of the mass distribution corresponds to zero. This is the point where force can be applied to induce linear acceleration without angular acceleration. The centre of the body’s mass is the position that changes as the forces … Read more
In physics, the centre of gravity is an arbitrary location in a body of matter where the total weight of the body can be assumed to be concentrated for simplicity in some calculations. The centre of gravity is identical to the centre of mass, in a uniform gravitational field. And still, not always do the … Read more
In the metric system, Centi is a unit prefix denoting a factor of one hundredth. Adopted in 1795, comes from the Latin word centum meaning “hundred.” It is primarily used to define centimetre, a common unit of length, in conjunction with metre. Centi (c) is the prefix = 10-2
A capacitor is an instrument that stores electrical energy in an electrical field. It is a passive, two-terminal, electronic component. The capacitor effect is known as capacitance. Although some power occurs in proximity in a circuit between any two electrical conductors, a capacitor is a device designed to add capacitance to a circuit. The capacitor … Read more
Candela (cd) is a luminous intensity unit within the Standard Unit System (SI). Described as the luminous intensity of a source emitting monochromatic radiation, in a given direction. In measurements involving artificial illumination the candela has replaced the traditional candle or lamp as a measure of luminous intensity and is often considered the “new candle.” … Read more
Brownian motion is the unpredictable motion of suspended particles in a medium. This motion pattern usually consists of spontaneous variations within a fluid subdomain in the direction of an object, accompanied by a displacement to another subdomain. The motion was named after the botanist Robert Brown who first described the phenomena in 1827 and saw … Read more
Max Plank introduces the Boltzmann constant, and is named after Ludwig Boltzmann. It is a physical constant which is obtained by taking the ratio of two constants, namely gas constant and Avogadro’s Number. The Boltzmann constant values are obtained by the division of gas constant R by the Avogadro’s Number. The Value of Boltzmann constant … Read more
Contact Binary is a type of Binary Star. Contact Binaries: Tidal forces will get into play when two stars are similar in separation. Since stars are not solid bodies but rather gases, gravity will strip material from one star to the other. Thus we conclude the binaries are in contact, even though their surfaces do … Read more
Spectroscopic Binary is a type of binary star. Another way to calculate star masses is to measure their relative velocities by moving their spectral lines via the Doppler. This is seen where the pair can not be resolved as a visible binary, but movement is used in the one-star spectra. You don’t need to see … Read more
Atto denotes a unit one-quintillionth (10−18) the size of the unit named by the stem. Atto (a) is a unit prefix denoting a variable of 10−18 or 0.0000000000000001 in the metric system. The unit multiple was introduced in Resolution 8 at the 12th General Weights and Measures Meeting. It comes from the Danish word atten … Read more
The number 6.022 × 1023 representing the number of atoms or molecules in a mole of any substance is called the Avogadro’s Number. One of the basic constants of chemistry is Avogadro’s Number. It helps one to compare the various atoms or molecules of the given substances where they have the same number of atoms … Read more
An atom is the smallest unit to break an element into without losing its chemical identity. Atoms consist of a large central nucleus surrounded by a swarm of electrons or negatively charged particles. The nucleus comprises both positive (protons) particles and electrically neutral (neutrons) particles. The number of protons is called the number of atoms. … Read more
Background radiation is a measure of the amount of ionizing radiation found in the atmosphere at a given site and is not attributable to intentional radiation sources being added. Background radiation comes from a number of natural as well as artificial sources. Both rocks and soils contain trace quantities of natural radioactivity, which can be … Read more
Astronomers use the term apparent magnitude to explain how luminous an object is from Earth in the sky. The idea of a scale of magnitude goes back to Hipparchus, who invented a scale to explain the brightness of the stars that he could see. He awarded the brightest stars in the sky an apparent magnitude … Read more