An `alpha` - particle moving with velocity `(1)/(30)` th times of velvelocity of light. If unceratinty in position is `(3.31)/(pi)` pm, then minmum unceratinty in kinetic energy is `yxx10^(-16)` J. Calculate the value of y.

If a metal is irradiated with light of frequency 3 xx 10^(19) sec^(-1) , electron is emitted with kinetic energy of 6.625 xx 10^(-15)J . The threshold frequency of the metal is

If a metal is irradiated with light of frequency 3 xx 10^(19) sec^(-1) , electron is emitted with kinetic energy of 6.625 xx 10^(-15)J . The threshold frequency of the metal is

A particle of mass 0.1 kg is executing simple harmonic motion of amplitude 0.1 m. When the particle passes through the mean position, its kinetic energy is 8xx 10^(-3) J . If the initial phase is 45^@ , the equation of its motion is (Assume, x(t) as the position of the particle at time t . )

It is not possible to determine precisely both the position and the momentum or velocity) of a small moving particle (e.g. electron , proton, etc) The uncertainity in position and velocity of a particle are 10^(-10)m and 5.27 xx 10^(-24) ms^(-1) respectively, Calculate the mass of the particle. (h = 6.625 xx 10^(-34)J-s)

The uncertainity in the position of an electron (mass 9.1 xx 10^(28)g ) moving with a velocity of 3.0 xx 10^(4) cm^(-1) accurate up to 0.011%, will be

The uncertainty in the position of an electron ("mass "9.1 xx 10^(-28)g) moving with a velocity of 3.0 xx 10^(4)cm^(-1) accurate up to 0.011% , will be

It is not possible to determine precisely both the position and the momentum or velocity) of a small moving particle (e.g. electron , proton, etc) Calculate the uncertainity in velocity of a cricket ball of mass 150 g if the uncertainity in its position is of the order of 1 Å (h = 6.6 xx 10^(-34) kgm^(2)s^(-1))