Darwinian fitness is lowered from minimum to zero, to check the undue accumulation of deleterious mutations by `:`

The minimum age of voting in India was lowered from 21 to 18 years by the Constitutional Amendment Act :

An electric field of magnitude 1000 NC ^(-1) is produced between two parallel platees having a separation of 2.0 cm as shown in figure(29.E4) (a) What is the potential difference between the plates? (b) With what minimum speed should an electron be projected from the lower plate in the direction of the field so that it may reach the upper plate? ( c) Suupose the electron is projected from the lower plate with the speed calculated in part (b) . The direction of projection makes an angle of 60@ with the field. Find the mazimum height reached by the electron.

An electric field of magnitude 1000 NC ^(-1) is produced between two parallel platees having a separation of 2.0 cm as shown in figure(29.E4) (a) What is the potential difference between the plates? (b) With what minimum speed should an electron be projected from the lower plate in the direction of the field so that it may reach the upper plate? ( c) Suupose the electron is projected from the lower plate with the speed calculated in part (b) . The direction of projection makes an angle of 60@ with the field. Find the mazimum height reached by the electron.

An electric field of magnitude 1000 NC ^(-1) is produced between two parallel platees having a separation of 2.0 cm as shown in figure(29.E4) (a) What is the potential difference between the plates? (b) With what minimum speed should an electron be projected from the lower plate in the direction of the field so that it may reach the upper plate? ( c) Suupose the electron is projected from the lower plate with the speed calculated in part (b) . The direction of projection makes an angle of 60@ with the field. Find the mazimum height reached by the electron.

In a hydrogen atom, the electron and proton are bounded at a distance of about 0.53A (a) Estimate the potential energy of the system in eV, taking the zero of the potential energy at infinte separation of the electron from proton. (b) Whatis the minimum work required to free the electron? Given that its kinetic energy in hte orbit is half the magnitude of potential energy obtained in (a). (c) What are the answer to (a) and (b) above if the zero of potential energy is taken at 1.06A separation?

STATEMENT - 1 : A particle is thrown by a man from ground. Minimum speed of the particle in the subsequent motion may not be zero. (Air resistance is neglected). and STATEMENT - 2 : Acceleration of the particle is never zero during the motion of the particle