Physics
Grade-8
Easy
Question
The SI unit of measurement of velocity is kg/s.
- True
- False
Hint:
Meter/sec
The correct answer is 'False'.
- The SI unit of measurement of velocity is (meter/sec) or m/s.
- Velocity = displacement/time
- The SI unit for displacement is meter (m).
- The SI unit for time is second (s or sec).
- So, the given statement is false.
Related Questions to study
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A guitar can produce __________.
A guitar can produce __________.
PhysicsGrade-8
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Sound from a speaker undergoes an echo to reach the source back from a mountain located at a distance of 340 m from the source. The total time taken by the sound to cover this distance is 2 s. The speed of sound is ___ m/s.
After echo, the total distance travelled = 2d
Sound from a speaker undergoes an echo to reach the source back from a mountain located at a distance of 340 m from the source. The total time taken by the sound to cover this distance is 2 s. The speed of sound is ___ m/s.
PhysicsGrade-8
After echo, the total distance travelled = 2d
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Decreasing amplitude of a sound wave decreases the _______.
Decreasing amplitude of a sound wave decreases the _______.
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Cinema theatres are designed for the sound to _______.
Cinema theatres are designed for the sound to _______.
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To make a sound louder, the sound should be _______.
To make a sound louder, the sound should be _______.
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If a sound travels a distance of 100 m in 2 s, its velocity is ____ m/s.
If a sound travels a distance of 100 m in 2 s, its velocity is ____ m/s.
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The horn of a vehicle is based on ___________ of sound.
- A megaphone works on the principle of multiple reflections of sound.
The horn of a vehicle is based on ___________ of sound.
PhysicsGrade-8
- A megaphone works on the principle of multiple reflections of sound.
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Sonar has receiver __________.
Sonar has receiver __________.
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Drums can produce ultrasound.
Drums can produce ultrasound.
PhysicsGrade-8
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Sound from a speaker undergoes an echo to reach the source back from a mountain located at a distance of 332 m from the source. The total time taken by the sound to cover this distance is 2 s. The speed of sound is ___ m/s.
- After echo the total distance covered by the sound = 2d.
Sound from a speaker undergoes an echo to reach the source back from a mountain located at a distance of 332 m from the source. The total time taken by the sound to cover this distance is 2 s. The speed of sound is ___ m/s.
PhysicsGrade-8
- After echo the total distance covered by the sound = 2d.
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The SI unit of time is ______.
- The SI unit of length is meter(m).
- The SI unit of pressure is Pascal(Pa).
- 1 bar = 105 Pascal
The SI unit of time is ______.
PhysicsGrade-8
- The SI unit of length is meter(m).
- The SI unit of pressure is Pascal(Pa).
- 1 bar = 105 Pascal
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Reverberation occurs only in ________ .
Reverberation occurs only in ________ .
PhysicsGrade-8
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A loud unpleasant sound is called a/an ______.
- An ultrasound has frequency more than 20kHz.
- And an infrasound has frequency less than 20Hz.
A loud unpleasant sound is called a/an ______.
PhysicsGrade-8
- An ultrasound has frequency more than 20kHz.
- And an infrasound has frequency less than 20Hz.
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A decrease in amplitude makes a sound wave _______.
A decrease in amplitude makes a sound wave _______.
PhysicsGrade-8
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Sounds that are pleasant to hear are called ultrasounds.
- Sounds which have frequencies more than 20kHz are called ultrasounds.
- Human ears are cannot perceive ultrasound.
Sounds that are pleasant to hear are called ultrasounds.
PhysicsGrade-8
- Sounds which have frequencies more than 20kHz are called ultrasounds.
- Human ears are cannot perceive ultrasound.
