 # Work done in Stretching a wire

Work done in Stretching a wire In stretching a wire work is done against internal restoring forces. This work is stored as elastic potential energy or strain energy. If a force F acts along the length L of the wire or cross section A and stretches it by x then: . So, the work done Read more about Work done in Stretching a wire[…] # Heat Engine Efficiency

Heat Engine Efficiency A heat engine is a device that converts heat into work continuously through a cyclic process. It takes heat from a reservoir then does some like moving a piston, lifting weight etc. and finally discharging some of the heat energy into the sink. Schematically it can be represented as: The essential parts Read more about Heat Engine Efficiency[…] # Magnetic Maps and Neutral Points

Magnetic Maps and Neutral Points Magnetic Maps: Magnetic map is obtained by drawing lines on the surface of earth, which passes through different places having same magnetic elements. Magnetic maps i.e.., declination, dip and horizontal component over the earth vary in magnitude from place to place. It is found that many places have the same Read more about Magnetic Maps and Neutral Points[…] # Resultant Amplitude and Intensity

Resultant Amplitude and Intensity Intensity if the power transferred per unit area that is perpendicular to the direction of propagation of the energy. Intensity is directly proportional to square root of the amplitude. So, if intensity becomes double, then amplitude will become four times. Let us consider two waves that have the same frequency but Read more about Resultant Amplitude and Intensity[…] # Thermal Capacity

Thermal Capacity Thermal Capacity of a substance is defined as the amount of heat required to change its temperature through one degree. If Q is the amount of required to change the temperature of a body of mass m through, then Q = msΔθ If temperature difference = 1, then Q = ms The value Read more about Thermal Capacity[…] # Collision between Bullet and Vertically suspended block

Collision between Bullet and Vertically suspended block A collision is said to have taken place if two bodies interact with each other and undergo a change in momentum and or kinetic energy. A bullet of mass m is fired horizontally with velocity u in block of mass M suspended by vertical thread. After the collision Read more about Collision between Bullet and Vertically suspended block[…] # Relation between Volumetric Strain, Lateral Strain and Poisson’s Ratio

Relation between Volumetric Strain, Lateral Strain and Poisson’s Ratio If the deforming force produces a change in volume along the strain produced in the body is called Volumetric Strain, the ratio of the change in radius or diameter to the original radius or diameter is called Lateral Strain, the ratio of lateral strain to longitudinal Read more about Relation between Volumetric Strain, Lateral Strain and Poisson’s Ratio[…] # Coefficient of Friction between a Body and Wedge

The coefficient of friction is a number which represents the friction between two surfaces. Between two equal surfaces, the coefficient of friction will be the same. The symbol usually used for the coefficient of friction is μ. A body slides on a smooth wedge of angle θ and its time of descents is t. if Read more about Coefficient of Friction between a Body and Wedge[…] # Acceleration of Block against Friction

Acceleration of Block against Friction Newton’s second law says that the acceleration (a) of an object is proportional to the force (F) applied on it, and the proportionality factor is the object’s mass (m). Force is a vector quantity, which means we must consider the direction in which it acts. Two main types of frictional Read more about Acceleration of Block against Friction[…] # Stopping of Two Blocks due to Friction

Stopping of Two Blocks due to Friction Friction is an opposing force that opposes the motion of one body over the surface of another body. Like in case of a ball freely rolling on the ground, the ball eventually comes to stop, because of the force of friction that acts between ball and the ground. Read more about Stopping of Two Blocks due to Friction[…]