We cannot hear the echo produced in a classroom.

Give scientific reasons Why cannot we hear the echo produced in a classroom?

Who cannot donate eyes?

Human ear cannot hear those mechanical waves whose frequency lies in the frequency range

Answer the following : How will you explain the statement 'we cannot see the objects in a dark room ' ?

Answer the following questions: Study the construction of the Golghumat at Vijapur and discuss the reasons for the multiple echoes produced there.

A drone fitted with siren in flying directly away from the drone operator and towards a distant building at a speed of 15 m//s . The siren produces sound of frequency 780 Hz. What is the frequency that the operator hears in the echo reflected from the building (Speed of sound is 340 m//s ).

Give reasons : We cannot stand at one place for a long time . How can we sleep on a place for 8 and odd hours ?

Collect pictures of various useful microbes. Display chart of their information in classroom.

afires a gun. He heard the echo of the sounds from the first building after 2 seconds and echo i from the second building after 3 seconds. Find the distance between two buildings. (Speed of sound in air = 340 m/s )