Two loudspeakers are arranged facing each other at some distance. Will a person standing behind one of the loudspeakers clearly hear the sound of the other loudspeaker or the clarity will be seriously damaged because of the 'collision' of the two sounds in between ?

Two identical loudspeakers are placed on a line at distance 4m and 6m from a microphone lying on the line joining them. The output of each speaker at the microphone is 2mW . If the two speakers are connected in series and excited by the same oscillator and they vibrate in phase with each other, the resultant ouput of the microphone will be (frequency of oscillator =660 Hz and speed of sound =330 m//s )

Two metal plates having charges Q and -Q face each other at some separation and are dipped into an oil tank .If the oil is pumped out, the eletric field between the plates will

Two plane mirrors are arranged parallel and facing each other at some separation. How many images are formed for a point object kept in between them? Show the formation of images with the help of a ray diagram.

Two waves are approaching each other with a velocity of 20m//s and frequency n . The distance between two consecutive nodes is

Two mirrors are placed at right angle to each other. A man is standing between them combining his hair. How many images he will see?

Two mirrors are placed at right angle to each other. A man is standing between them combining his hair. How many images he will see?

Two celestial bodies are separated by some distance. If the mass of any one of the bodies is doubled while the mass of other is halved then how far should they be taken so that the gravitational force between them becomes one-fourth ?

Two celestial bodies are separated by some distance. If the mass of any one of the bodies is doubled while the mass of other is halved then how far should they be taken so that the gravitational force between them becomes one-fourth ?

A steel tube of length 1.00 m is struck at one end. A person with his ear close to the other end hears the sound of the blow twice one travelling through the body of the tube and the other through the air in the tube. Find the time gap between the two hearings.