Physics, 27.08.2019 16:30 dre2544

Through which substance will sound travel fastest?
the ground
the ocean
the air

Answers: 2

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Answer from: lekepius3715

The correct option is the ground.

Explanation:

Sound is a longitudinal wave. In longitudinal wave, the particles vibrate parallel to the direction of the propagation of the wave.

It needs medium to travel. It can travel in solid, liquid and gas.

Sound wave travels faster in solid in comparison to liquid.

It travels slowest in air.

Ground is a denser medium. Here, the sound wave travels faster in comparison to the ocean and the air.

Therefore, the correct answer is the ground.

Answer from: Quest

Isuck at math i am no sorry

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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Through which substance will sound travel fastest?
the ground
the ocean
the air...

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