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Why is the Kinetic energy of the system minimum in the frame of the center of mass for any number of particlessolution) The kinetic energy of any entity depends on the reference frame in which it is measured. Though the total energy of an isolated system, i.e. one which energy can neither enter nor leave, does not change in whatever reference frame it is calculated. Therefore, the chemical energy converted to kinetic energy by a rocket engine is divided differently among the rocket ship and its exhaust stream depending upon the chosen reference frame. This is known as the Oberth effect. But the total energy of the system, including kinetic energy, fuel chemical energy, heat, etc., is conserved over time, regardless of the choice of reference frame. Different observers moving with dissimilar reference frames disagree on the value of this conserved energy.The kinetic energy of such systems depends on the choice of reference frame: the reference frame that gives the minimum value of that energy is the center of momentum frame, i.e. the reference frame in which the total momentum of the system is zero. This minimum kinetic energy contributes to the invariant mass of the system as a whole.
You are offered with two strips of metallic foil two strips of waxed paper and two metal paper clips. Every strip is in the shape of a rectangle 2 inches wide and 5 feet long. Whic
The radioisotope 222 84 Po undergoes alpha decay to form an isotope of lead (lead has atomic number 82). Verify what the mass number of that isotope must be by writing a nuc
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ROTOR: (i) squirrel -cage rotor (ii) phase-wound or wound-rotor 90% of Induction Motor are squirrel cage type due to this type of rotor has a easiest and the most rugged
The radius of an atom is of the order of: (1) 10 -10 cm (2) 10 -13 cm (3) 10 -15 cm (4) 10 -8 cm Ans: (4)10 -8 cm
A ray of light travelling in air is incident on a prism and passes through it with a speed of 2X10 8 ms -1 parallel to its base. If the angle of refraction is similar to half of
Fizeau method (A. Fizeau, 1851): One of the first really relativistic experiments intended to calculate the speed of light. Light is flow through a spinning cogwheel driven th
It is the opposition offered by the material of the flux. Reluctance α mean length of flux path and reluctance α 1/cross section A Reluctance=1/μ 0 μ r A Here μ 0 a
Charging: During charging the device is linked across a source of D.C. supply having a voltage of about 3 volts. When the circuit is switched on the current flows inside the cell
Ray Diagrams for Concave Mirrors Object Located Beyond the Center of Curvature: Ray diagrams are meaningful tools for denoting the location of an image as generates through a
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