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01. Calculate the kinetic energy of a body of mass 5 kg, which is moving with a velocity of 15 m/..

01. Calculate the kinetic energy of a body of mass 5 kg, which is moving with a velocity of 15m/s. Solution: Mass of the body (m) = 5kg Velocity of the body (v) = 15m/s Kinetic energy = 1/2mv 2 Kinetic energy = 562.5 J 02. A dog of mass 20kg is running at a constant speed of 12m/s..

01. A body of mass 2kg is raised to a height of 25m. Calculate the potential energy possessed by the body. Solution: Mass of the body (m) = 2kg Height (h) = 25 m Potential energy of the body = mgh 02. A bag of rice weighs 75kg. To what height is it raised if the work done in lifting it is..

01. A man of mass 60 kg runs up a flight of 60 steps in 40 seconds. If each step is 20 cm high, calculate his power. Solution: Since the man runs up a flight of steps, the work done will be equal to the potential energy. Height = height of one step x number of ste..

Calculation of Degree of Dissociation - Degree of Dissociation [ a ] - It is defined as the fraction of the total number of molecules undergoing dissociation at a given concentration. Example: If 100 molecules of acetic acid are added to H 2 O of which 10 molecules ion..

Calculate the value of constan..

Calculate the resultant force on the 10 microcoulomb of charg..

Calculate the potential at the centre O of the squar..

Using the Rydberg formula, calculate the wavelengths of the first four spectral lines in the Balmer series of the hydrogen spectru..

Eight charges having the values shown in figure are arranged symmetrically on a circle of radius 0.4 m in air. Calculate the potential at the centre ..