Physics, 28.11.2019 09:31 shamiahG

How can the design of a building such as a concert hall reduce unwanted noises and echoes

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The design of the building matters because sound bounces around, it is asorbed by soft material, If it is big and open you might have an echo, so the design affects how the sound bounces and echos, or how the sound is asorbed.

Answer from: caleb1009

The design can be made with concrete do noise doesn't spread all the noise and doesn't make an echo

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.

Answer from: Quest

The object's initial distance above the groundthe object's initial velocity

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How can the design of a building such as a concert hall reduce unwanted noises and echoes...