Find the distance of cloud from you when you hear a thunder 3 seconds after the lightning is seen. Given speed of light =3x108 m/sec, speed of sound = 330m/sec. Also draw the figure.
Find the distance of cloud from you when you hear a thunder 3 seconds after the lightning is seen. Given speed of light =3x108 m/sec, speed of sound = 330m/sec. Also draw the figure.
Asked by rkjha_in | 22nd Mar, 2015, 09:56: PM
Expert Answer:
We know that the speed of light is greater than the speed of sound. Thus, lightning will reach in no time but the thunder will be heard 3 seconds after the lightning by the man.
We know that the lightning and the sound travels the same distance, let us consider that as 'd'.
Let 'v1' and 't1' be the velocity of the lightning and the time taken by it to reach the man. Similarly, 'v2' and 't2' be the velocity and the time taken by the thunder to reach the man.
Thus, the cloud is at a distance of 990 m from the man.
Answered by Yashvanti Jain | 11th Dec, 2017, 07:23: PM
Related Videos
- Two children are opposite ends of an rod one strikes the end of rod with a stone. Find the ratio of time taken by the sound wave in air and in rod to reach the second child. If the speed of sound in air is 346m/s and in rod 6420m/s
- How sound is stored in a voice recorder whether it is an energy
- name two device which work on the basis of reflection of sound
- Sunil is standing between two walls.the wall closest to him is at a distance of 360 m. if he shouts , he hears the first echo after 4s and another 2 second . What is the veocity of sound in air ? What is the distance between the two walls
- Name few instruments which are based on multiple reflection of sound?
- What is an echo?
- What is reverberation?
- How can we minimize reverberation in community hall to hear clear sound?
- Why ceilings of concert halls and conference halls are made curved?
- Show that the reflector must be situated at a least distance from the observer for formation of distinct echo. What is the value of this distance at room temperature?
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change