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Nadusha1986 [10]
3 years ago
7

Explain why a crack in glass looks brighter than the rest of the glass

Physics
1 answer:
m_a_m_a [10]3 years ago
8 0

Answer:

Because nothing is blocking the LIGHT!

Explanation:

Light may still be shining on the whole glass but if it wasn't there light would shine brighter than if it was there.

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Explain how surface waves can have characteristics of both longitudinal waves and transverse waves. Please use 3 content related
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Read 2 more answers
A mass of 100 g stretches a spring 5 cm. If the mass is set in motion from its equilibrium position with a downward velocity of
Rudiy27

Answer:

Explanation:

Given

mass of spring m=100\ gm

extension in spring x=5\ cm

downward velocity v=70\ cm/s

Position in undamped free vibration is given by

u(t)=A\cos \omega _0t+B\sin \omega _0t

where \omega _0^2=\frac{k}{m}

also \frac{k}{m}=\frac{g}{L}

\omega _0^2=\frac{k}{m}=\frac{9.8}{0.05}

\omega _0=14

u(t)=A\cos(14t)+B\sin(14t)

it is given

u(0)=0

u'(0)=70\ cm/s

substituting values we get

A=0

u(t)=B\sin (14t)

u'(t)=14B\cos (14t)

70=14B

B=\frac{10}{2}

B=5

u(t)=5\sin (14t)

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3 years ago
Question 25 of 30
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Answer:

it's B. circuit a and b are series circuit while c is parallel

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