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It is the need of elastic strength of a substance when subjected to repeated stresses and strain. If the substance is reserved undisturbed for some time, the previous properties are restored. Therefore elastic fatigue is a temporary phenomenon.
Q. Why there is no horizontal acceleration during projectile motion? Ans: The gravitational force (F)acting on the particle during its flight has only vertical component i.e. F(co
A football player kicks a field goal from a distance of 45 m from the goalpost. The football is launched at a 35° angle above the horizontal. What initial velocity is neede
A ray of light travelling in air is incident on a prism and passes through it with a speed of 2X10 8 ms -1 parallel to its base. If the angle of refraction is similar to half of
a body of mass M is acted upon by a force F and the acceleration produced is a.if three forces each equal to F and inclined to each other at 120degrees act on the same body,the acc
Concept: You are moving into an apartment and take the elevator to the 6th floor. Does the force exerted on you by the elevator do positive or negative work when the elevator (a)go
If a proton and an electron have same de Broglie wavelength, which has more kinetic energy and momentum?
Faraday's law The line integral of the electric field about a closed curve is proportional to the instant time rate of change of the magnetic flux by a surface limited by tha
Transition temperature It is temperature (based on the substance involved) below which a superconducting substance conducts electricity with zero resistance; as a result, the t
Galvanometer: 1. An electromechanical instrument, which is used to detect the presence of current in a circuit is known as galvanometer. 2. The major parts of a galvanomete
A stone drops from the edge of the roof. It passes the window 2 m high in 0.1s . How far is the roof above the top of the window? Solution) Height of the window (h) = 2m Acce
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