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A stream of electrons, each of energy 𝑬 = 𝟑𝒆𝑽 is incident on a potential of height 𝑽𝟎 = 𝟒𝒆𝑽 . The width of the barrier is 20Å. Calculate the percentage transmission of the beam through this barrier.?
At what fraction of the speed of light does a particle travel if it's kinetic energy is twice it's rest mass
Show that quantum mechanics reduces to classical mechanics for 𝒉 →0
A hydrogen balloon at the Earths surface has a volume of on a day when the temperature is and the pressure 1 atm. What is the mass of hydrogen? The balloon rises and expands as the pressure drops. What would be the volume of the same number of molecules of hydrogen at an altitude of 40km where the pressure is and temperature is
What is the probability of finding a particle at centre of box in it's first excited state in a infinite potential well ??
A Static electric field is distributed in a spherical shell of inner radius R1 and Outer radius R2 electric charge density is given by p= a+br ,where R is the distance from the centre and zero everywhere else.
(1). Find an expression for the electric field everywhere in terms of R.
An 800N elevator hangs by a steel cable for which the allowable stress is 1.2×10⁸ n/m².What is the minimum diameter required if the elevator accelerates upwards at 1.5m/s²?
A hydrogen balloon at the earth's surface has a volume of 5m³ on a day when the temperature is 27°c and the pressure 1 atm.what is the mass of hydrogen ?
The balloon rises and expands as the pressure drops .What would be the volume of the same number of molecules of hydrogen at an altitude of 40 km where the pressure is 0.33× 10^3 Pa and temperature is - 13°C
A wave is travelling in the negative direction has a frequency of 40 Hz ,a wavelength of 3cm and an amplitude of 0.6cm.write the wave function y(x,t) given that y=0.6cm at x =0 and t =0.
A block attached to a spring is released at t =0 with the spring extended.the period of oscillation is 0.61s.At t = 0.05s the velocity is v=-96.4cm/a.(1)what is the amplitude? (2)what is the total energy?
