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kifflom [539]
3 years ago
7

If you were trying to build a sound proof room, which of the following materials would you choose in order to absorb the most so

und, based on the coefficient of absorption for each material
Physics
1 answer:
LuckyWell [14K]3 years ago
7 0
The sound absorption for wood is greater than the sound absorption coeffiecient for concrete at most frequencies, hence based on the coefficient of absorption for each material, wood is the best choice.


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ArbitrLikvidat [17]

Answer:

a) 147.95 Mpc

Explanation:

Using Hubble's formula

v = H_od

where;

v = radical velocity

H_o = Hubble's constant

d = distance

Given that:

The average radial velocity of galaxies in the Hercules cluster v =  10,800 km/s

Also using H_o = 73 km/s/ Mpc ; we  make distance d the subject of the formula:

Then distance d can be written as:

d = \frac{v}{H_o}

d = \frac{10,800  \ km/s}{73 \ km/s/Mpc}

d = 147.95 Mpc

b)

Now, if the Hubble constant had a smaller value, then for a  given velocity the distance to the galaxy will increase because distance d is inversely proportional to H_o

i.e  

d  ∝ \frac{1}{H_0}

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A force of F = (2.00ˆi + 3.00ˆj) N is applied to an object that is pivoted about a fixed axle aligned along the z coordinate axi
Vladimir [108]

Explanation:

It is given that,

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(b) The cross product of force and position vector is used to find the net torque about the z axis. It is given by :

\tau=F\times r

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\tau=(-2k)\ N-m

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Simora [160]
Data D has the largest range.

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A person on a merry go round is constantly changing direction
Salsk061 [2.6K]

Answer: yurp

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