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Van der Waals force (J.D. van der Waals):
It is the forces which is responsible for the non-ideal behavior of gases, & lattice energy of molecular crystals. There are three causes: dipole-induced dipole moments; dipole-dipole interaction; and dispersion forces arising due to small instantaneous dipoles in atoms.
Q. What are uses of ultra-violet radiations? Uses of ultra-violet radiations: (i) They are utilized to destroy the bacteria and for sterilizing surgical instruments.
It describes the temperature above which the material loses its spontaneous polarization and piezoelectric characteristics.
Q. An X-ray diffraction of a crystal gave a closest line at an angle of 6o27'. If the wavelength of X-ray is 0.58Ao, find the distance between the two cleavage planes. 2d Sinθ
A particle moving in a straight line with constant accelaration is having initial velocity of 10 m/s. After some time, the velocity becomes 30 m/s. Find the velocity of particle at
A thermocouple is used to calculates very high (2000 0 C) as well as very low (- 200 0 C) temperature in industries and laboratories. The thermocouple used to measure very high tem
tau-theta paradox (1950s): While two distinct types of kaons, tau & theta (today tau is a completely different particle) decay, tau decays in three particles, whereas the thet
AC Input Resistance in Common Emitter Configuration Ratio of change in base emitter voltage ( ? V BE ) to the resulting change in base current ( ? I B ) at cons
Figure shows the transfer characteristic for an n-p-n silicon transistor.When the base current is 2.5mA, Verify (a) the value of collector current, (b) the static value of
What is the essential difference between an electron and a beta ray? The electron of nuclear origin is known as a beta-particle. There is otherwise no difference among an elec
A right triangular prism has volume equal to 288 cm^3. The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine th
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