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 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 sounds may be produced by elephants?

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 What is the real cause of sound production? Explain with examples.

Complete the paragraph Complete the following paragraph by choosing correct alternatives from those given in the bracket. (audible, 20 Hz, infra-sound, greater, 20,000 Hz, electrical signals, less, pressure) Range of frequencies of sound which can be heard by the human ears is called ________sound. The range of audible sound is between_________to __________to . Sound of frequency less than 20 Hz is called ______Ultra sound has a frequency ______than 20,000 Hz. Human ear converts pressure variations in air into_________.

Two tuning forks of frequencies 256 Hz and 258 Hz are sounded together. Then the timesinterval between two consecutive maxima and minima heard by an observer is

A car is moving with a speed of 72 km-hour^(-1) towards a roadside source that enits sound at a frequency of 850 Hz. The car driver listens to the sound while approching the source and again while moving away from the source after crossing it. If the velocity of sound is 340 ms^(-1) , the difference of the two frequencies the driver hears is

The sound emitted from the siren of an ambulance has frequency of 1500 Hz. The speed of sound is 340 m//s . Calculate the difference in frequencies heard by a stationary observer in the ambulance initially, travels towards and then away from the observer at a speed of 30 m//s .

The frequency of a whistle of the engine of an express train moving with 20 m/s appears as 500 Hz to a car driver moving with the velocity 15 m/s. The velocity of the sound in air is 335 m/s. If the train and car are moving in opposite directions towards each other, then the frequency of the whistle is