Advertisements
Advertisements
प्रश्न
What is the other name of a loud-hailer ?
Advertisements
उत्तर
Megaphone or bullhorn is also called as loudhailer.
APPEARS IN
संबंधित प्रश्न
What is meant by an echo?
Fill in the blank with suitable word :
An echo is simply a ................... sound.
Name any two objects which are good reflectors of sound.
What is an echo ? How is echo formed ?
An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal ?
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method ?
Answer the following question in your own words.
What is an echo?
What is an echo?
State two conditions necessary for hearing an echo.
______ allows bats to navigate through dark caves and find insects for food.
