Explain heart sounds .

Explain how sound is produced by your school bell.

The "lubb" sound (first heart sound) is caused by

Second heart sound is associated with the

Go through the following statements, (i) The stroke volume multiplied by heart rate gives the cardiac output. (ii) The second heart sound is associated with the closure of semilunar valves (iii) Heart failure is the same as cardiac arrest or a heart attack. Which of these are correct ?

The second heart sound (dubb) is associated with the closure of

Explain the flow of blood and heart attck by using the principle of Bernoulli's theorem.

Briefly explain the ideas discussed by the following topics in physics. (i) Mechanics (ii) Optics (iii) Sound.

A racing car movnig towards a cliff, sounds its horn. The driver observes that the sound reflected from the cliff has a pitch one octave higher than the actual sound of the horn. If v is the velocity of sound, then the velocity of the car is

Which is the first Heart sound ?