Physics
Grade-8
Easy
Question
If the sound travelled a distance of 12 m in 2 s. Find the velocity of sound in echo.
- 6
- 24
- 12
- 3
Hint:
Speed depends on medium.
The correct answer is: 12
- The speed will be same.
- For echo total path =12*2=24.
- Times also double so speed remains same.
- Also speed of sound depends on medium until medium is not changed speed will not change.
Related Questions to study
Physics
Drums can produce ultrasound.
Drums can produce ultrasound.
PhysicsGrade-8
Physics
The units of time:
1 Bar = 105 Pascal
The units of time:
PhysicsGrade-8
1 Bar = 105 Pascal
Physics
Reverberation occurs only in ________.
Reverberation occurs only in ________.
PhysicsGrade-8
Physics
The louder unpleasant sound is called as ______.
The louder unpleasant sound is called as ______.
PhysicsGrade-8
Physics
SONAR is used in _______.
- It works on the principle of reflection of ultrasound waves.
SONAR is used in _______.
PhysicsGrade-8
- It works on the principle of reflection of ultrasound waves.
Physics
The sound from the transmitter of the SONAR is reflected by.
The sound from the transmitter of the SONAR is reflected by.
PhysicsGrade-8
Physics
The SONAR can detect the enemy ship using _________.
The SONAR can detect the enemy ship using _________.
PhysicsGrade-8
Physics
Distance can be measured in ___________.
- The SI unit of time is second.
- The SI unit of pressure is pascal.
- The SI unit of force is newton.
Distance can be measured in ___________.
PhysicsGrade-8
- The SI unit of time is second.
- The SI unit of pressure is pascal.
- The SI unit of force is newton.
Physics
The SI unit of velocity is kg/s.
The SI unit of velocity is kg/s.
PhysicsGrade-8
Physics
Guitar can produce __________.
Guitar can produce __________.
PhysicsGrade-8
Physics
If the velocity of sound is 3 m/s and the distance between the object is 3 m, find the time taken to hear an echo?
If the velocity of sound is 3 m/s and the distance between the object is 3 m, find the time taken to hear an echo?
PhysicsGrade-8
Physics
Sounds which are unpleasant to hear are called ________.
- A pleasant sound is called music.
Sounds which are unpleasant to hear are called ________.
PhysicsGrade-8
- A pleasant sound is called music.
Physics
Decreasing amplitude decreases _______.
Decreasing amplitude decreases _______.
PhysicsGrade-8
Physics
Amplitude is denoted by __________.
Amplitude is denoted by __________.
PhysicsGrade-8
Physics
An increase in amplitude makes a sound wave _______.
An increase in amplitude makes a sound wave _______.
PhysicsGrade-8
