3 years ago

Soundproof rooms take advantage of which property of waves

Physics

2 answers:

andrey2020 [161]3 years ago

7 0

The Absorption one

and im writing more cause 20 character thing

enot [183]3 years ago

3 0

The answer is Absorption.

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Igneous rocks weather more easily than sedimentary rocks.

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Answer:

False because igneous rocks are formed from a volcano and sedimentary never move they stay in one spot

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3 years ago

In the 2008 Olympics, Jamaican sprinter Usain Bolt shocked the world as he ran the 100-meter dash in 9.69 seconds. Determine Usa

-Dominant- [34]

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His average speed was 10.3199 m/s.

Explanation:

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4 years ago

Two football players are attempting to tackle each other. If one football player has a mass of 100 kg and pushes with a force of

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is it 20kg. Two opposing forces pushing onto each other

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3 years ago

What is the temperature of the lithosphere?

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3 years ago

A mass weighting 16 lbs stretches a spring 3 inches. The mass is in a medium that exerts a viscous resistance of 20 lbs when the

const2013 [10]

Answer:

The equation for the object's displacement is $u(t)=0.583cos11.35t$

Explanation:

Given:

m = 16 lb

δ = 3 in

The stiffness is:

$k=\frac{m}{\delta } =\frac{16}{3} =5.33lb/in$

The angular speed is:

$w=\sqrt{\frac{k}{m} } =\sqrt{\frac{5.33*386.4}{16} } =11.35rad/s$

The damping force is:

$F_{D} =cu$

Where

FD = 20 lb

u = 4 ft/s = 48 in/s

Replacing:

$c=\frac{F_{D} }{u} =\frac{20}{48} =0.42lbs/in$

The critical damping is equal:

$c_{c} =\frac{2k}{w} =\frac{2*5.33}{11.35} =0.94lbs/in$

Like cc>c the system is undamped

The equilibrium expression is:

$u(t)=u(o)coswt+u'(o)sinwt\\u(o)=7=0.583\\u'(o)=0\\u(t)=0.583coswt\\u(t)=0.583cos11.35t$

3 0

3 years ago