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3 years ago

What will happen if the reverberation time in a big hall is too long? How can we reduce it?

2 answers:

6 0

Reverberation is the persistence of sound due to repeated reflection, where an echo may be heard. We can reduce the reverberation by covering the roof and the wall of the hall with sound absorbing materials like Acoustical panels, Noise and sound isolation foams, MLV ( Mass Loaded Vinyl) Soundproofing foam, etc.

Varvara68 [4.7K]3 years ago

5 0

Reverberation is persistence of sound we can reduce it by putting sound absorbent materialas

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A force of 100N is applied to an area of 100mm².what is the pressure exerted on the area in N/m².

Dmitry_Shevchenko [17]

Answer:

P = 1000000[Pa] = 1000 [kPa]

Explanation:

To solve this problem we must use the definition of pressure, which is equal to the relationship of force over area.

$P=F/A$

where:

P = pressure [Pa] (units of pascals)

F = force = 100 [N]

A = area = 100 [mm²]

But first we must convert the units from square millimeters to square meters.

$A=100[mm^{2}]*\frac{1^{2} m^{2} }{1000^{2}mm^{2} } =0.0001[m^{2} ]$

Now replacing:

$P=100/0.0001\\P=1000000[Pa]$

3 0

3 years ago

A standard gold bar stored at Fort Knox, Kentucky, is 7.00 inches long, 3.63 inches wide, and 1.75 inches tall. Gold has a densi

Liula [17]

Answer:

14.1 kg

Explanation:

Given:

Length=7.00inches

Width=3.63 inches

Height=1.75 inches

density = 19,300 kg/m3.

We can convert the given parameters to metre for unit consistency

But we know 1 inches= 0.0254 metre

✓Then Length l=7.00inches

=7×0.0254 metre=0.1778m

✓Width w =3.63 inches

==3.63 ×0.0254 metre=0.092m

✓Height h =1.75 inches

=1.75 ×0.0254 metre=0.0445 m

But Mass= density × volume

Volume= Length× width×height

Mass= density× Length× width×height

= 19300kg/m³×0.1778×0.0922×0.0445

=14.1 kg

Therefore, the mass of the gold bar is 14.1 kg

4 0

3 years ago

What is the main difference between analog anddigital technology?a. Digital technology reproduces sound more faithfullythan anal

daser333 [38]

Answer:

Answer b)

Explanation:

The correct answer is that analog technology stores information as sound-waves, while digital technology stores it as strings of ones and zeroes. So pick answer b)

3 0

3 years ago

If we know the force, the distance, and the time we can calculate only power. work and power. only work. neither work or power.

scZoUnD [109]

Work = (force) x (distance)

Power = (work) / (time)

Knowing force, distance, and time, it looks like
you can calculate both work and power.

But that's not all !

-- Speed = (distance) / (time)

-- Impulse = change in momentum = (force) x (time)

7 0

4 years ago

Read 2 more answers

Which compound uses the oxidation numbers to write the chemical formula?

pantera1 [17]

Inorganic chemical compounds

Explanation:

Inorganic chemical compounds employ the use of oxidation numbers of atoms to write their chemical formula.

The oxidation number is the formal charge assigned assigned to an atom present in a molecule or formula unit or ion based on some rules.
Knowledge of this number is used in writing the formulae of inorganic compounds.
These compounds forms by the exchange of certain small whole numbers by atoms or groups of atoms.
The combining power usually correspond to the number of electrons usually lost or gained or shared by atoms of elements during chemical combinations or the number of positive or negative charges carried by ions.

For example:

A B

combining power(Valency): X Y

Exchange of valencies Y X

Molecular formula of compound A $_{y}$ Bₓ

Learn more:

Compounds brainly.com/question/5961886

#learnwithbrainly

5 0

3 years ago