Recently Active Physics Questions

If ultrasonic, infrasonic and audio waves travel through a medium with speed v1 v2 and v3 respectively, then v1 = v2 = v3 v1 > v3 > v2 v1 < v3 < v2 v3 ≤ v1 and v1= v3 Your Answer b Correct Answer a 3 WAVES HAVE ...

Two thin similar convex glass pieces are joined together front to front,with its rear portion silvered such that a sharp image is formed 0.2 m for an object at infinity.When the air between the glass pieces is replaced by wat ...

A body of mass m slides down a horizontal plane asit is pushed by aforce F which makes an angle θ with the horizontal.sow that the normal force acting on the body is given by N = mg + Fsinθ.Find the acceleration in terms of ...

shouldnt the answer be 1 ampere? ...

can anyone explain the meaning of multipole...????n is it related to dipole...??? ...

A radar is able to detect the reflected waves from an enemy aeroplane after a time interval of 0.02ms. if v= 3X10^8m/s. d= ...

A boy stands in front of a tall wall and claps. The boy continues to clap every time an echo is heard. Another boy finds that the time taken between the firs and 51st clap is 18s. v=? 330m/s 340 m/s 333m/s none ...

*Image* A trolley is being self-pulled up an incline plane by a man sitting in it. He applies a force of 250 N. If the combined mass of the man and trolley is 100 kg, find the acceleration of the trolley. ...

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*Image* My approach... Initially height is h and let after the temp. is increased to 100°C the height be h'. The buoyant force(U)=h*A*p*g(Initially,and A is the area of cross section of the cylinder) After the temp. increase ...

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*Image* it is an infinite grid.. each segmnt of each resitance is R. all are equal squares.. to find resistance between A nd B ...

If tan^2α=1+2tan^2β,prove that cos2β=1+2cos2α ...

In my class X physics book it is written that the expression W=QV "is analogous to the amount of work needed in lifting a weight mg from the earth surface to a vertical height h which is given as W=mg x h = mgh. Obviously on ...

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Find equivalent resistance between A & B. *Image* ...

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A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of electric fields with direction exist along its path as shown in figure *Image* 1.Find the velocity after very long time. 2. ...

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