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fiasKO [112]
3 years ago
6

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

nd, based on the coefficient of absorption for each material?
A. Wood
B. Concrete
C. Heavy curtains
D. Carpe
Physics
2 answers:
anzhelika [568]3 years ago
3 0
<span>in order to absrob the most sound, the materials that you should choose is : D. carpe Carpe is very effective in absorbing sound because it is made from Rubber Foam, which has the absorbtion coefficient of 0.5 -0.7 , which is the highest coefficient compared to the other remaining options </span>
Arte-miy333 [17]3 years ago
3 0

Answer:carpet

Explanation:

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What force must be provided to accelerate a 64-lb object upward at a rate of 2 ft/s2? (Use g = 32 ft/s2.)
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Answer:

The force that must be provided to accelerate the object = 302.196 N

Explanation:

<em>Force</em>: Force can be defined as the product of mass and acceleration. The S.I unit of force is Newton (N).

Ft - W = ma............ Equation 1

Ft = W + ma .......... Equation 2

Where Ft = force provided, W = weight of the object, m= mass of the object, a = acceleration of the object.

<em>Given: mass = 64 lb, g = 32 ft/s² a = 2 ft/s²</em>

<em>Conversion: (i)  from 64 pounds to Kg = 64/2.2046</em>

<em>                       = 29.03 kg</em>

<em>   (ii)  from 2 ft/s² to m/s² = 0.3048 × 2 = 0.6098 m/s²</em>

<em> (iii) from 32 ft/s² to m/s² = 0.3048×32 = 9.8 m/s².</em>

and W = mg = 29.03 × 9.8 = 284.494 N,

Substituting these values into equation 2,

Ft = 284.494 + 29.03×0.6098

Ft = 284.494 + 17.7

Ft = 302.196 N

Therefore, the force that must be provided to accelerate the object = 302.196 N

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3 years ago
A 282 kg bumper car moving 3.50 m/s collides with a 155 kg bumper car moving -1.38 m/s. Afterwards the 282 kg car moves at 1.10
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Answer:

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v = 4.03 m/s

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Explanation:

For this problem, use the first law of thermodynamics. The change in energy equals the increase in heat energy minus the work done.

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