Consider two cases
(A) whistle of train (B) roar of a lion
What is the real cause of sound production? Explain with examples.

Consider two cases (A) whistle of train (B) roar of a lion In which case the sound is high pitch?

Consider two cases (A) whistle of train (B) roar of a lion Three sounds 5 Hz, 500 Hz and 50,00 Hz are procued by different sources. Which sounds may be produced by bats?

Consider two cases (A) whistle of train (B) roar of a lion Three sounds 5 Hz, 500 Hz and 50,00 Hz are procued by different sources. Which sound will be heard by humans?

Consider two cases (A) whistle of train (B) roar of a lion Three sounds 5 Hz, 500 Hz and 50,00 Hz are procued by different sources. Which sounds may be produced by elephants?

A projectile can have the same range R for two angles of projection. If t_1 and t_2 are the times of flight in the two cases, then the product of the two time of flight is proportional to A. R^2 B. frac(1)(R^2) C. frac(1)(R) D. R

Two trains A and B moving with speeds 20m//s and 30m//s respectively in the same direction on the same straight track, with B ahead of A . The engines are at the front ends. The engine of train A blows a long whistle. Assume that the sound of the whistle is composed of components varying in frequency from f_(1) = 800 Hz to f_(2) = 1120 Hz , as shown in the figure. The spread in the frequency (highest frequency - lowest frequency) is thus 320 Hz . The speed of sound in still air is 340 m//s .The speed of sound of the whistle is

A man is watching two trains, one leaving and the other coming in with equal speeds of 4 m//s . If they sound their whistles, each of frequency 240 Hz, the number of beats heard by the man (velocity of sound in air = 320 m//s ) will be equal to

A student performed following two activities in school laboratory: Activity 1: Addition of zinc dust into copper sulphate solution taken in a test tube. Activity 2: Addition of an iron nail into copper sulphate solution taken in a test tube. He noted down his observations and concluded that chemical reaction occurs in both the cases based on the observed colour change of the resulting solution. What are the products formed in Activity 2?

Two sources A and B are sounding notes of frequency 680 Hz. A listener moves from A to B with a constant velocity u. If the speed of sound is 340 m/s, What must be the value of u so that he hears 10 beats per second?

Choose the correct alternative and write it along with its allotted alphabet: What can you say about the planes in which the incident and reflected sound waves lie? A. Planes perpendicular to each other B. The same plane C. Planes parallel to each other D. Two different planes