If the kinetic energy of of electron moving in fourth orbit of hydrogen is €, then the total energy in first orbit of li 2+ is

For hydrogen like atom. En \(\propto\) -\(\frac{Ƶ^2}{n^2}\) En = -k\(\frac{Ƶ^2}{n^2}\) for hydrogen atom- E4 = -k\(\frac{(1)^2}{4^2}\)  E4 = \(\frac{-k}{16}\)  given, E4 = € \(\because\) k = -€ x 16----(1) For Li+2 E1 = \(-\frac{k(3)^2}{1^2}\)  = -k x 9 using equation (1) we get E1 = € x 16 x 9 E1 = 144 €

(d) 5000 k J

In case of SHM at the time of maximum kinetic energy the potential energy is minimum. In SHM, potential energy is maximum at extreme position and minimum at the mean position. Similarly, the...

Expression for kinetic energy  Ek= ½ mv2  m = Mass of object  v = Velocity of the object in ms−1  Given that kinetic energy, Ek=25J  (i) If the velocity of an object is doubled, then...

(a)(i) According to the law of conservation of energy, energy can neither be created nor be destroyed but can be transformed from one form to another. Here, the increase in...

(a) Kinetic energy of an object is defined as the energy possessed by a body by virtue of its motion.  It is given by, K.E = 1/2 mv2  No, the kinetic energy...

True In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the system. This is because in such collisions, there is always a loss...

No In an elastic collision, the total initial kinetic energy of the balls will be equal to the total final kinetic energy of the balls. This kinetic energy is not conserved...

Kinetic energy Less Total mechanical energy of a satellite is the sum of its kinetic energy (always positive) and potential energy (may be negative). At infinity, the gravitational potential energy of the...

(a) always Explanation:  Whatever be the force, the work done on the particle by the resultant force is always equal to the change in its K.E. (Either increase or decrease).