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JulijaS [17]
3 years ago
9

HELP! SHOW STEPS PLEASE!

Physics
1 answer:
jeyben [28]3 years ago
5 0

Answer:

The temperature is (-19.67) degrees Celsius.

Explanation:

It is required to find the temperature if the speed of sound through air is measure to be 319 m/s.

The speed of sound in terms of temperature is given by :

v=331+(0.61) T

T is temperature and v = 319 m/s

319=331+(0.61) T\\\\-12=(0.61) T\\\\T=\dfrac{-12}{0.61}\\\\T=-19.67^{\circ} C

So, the temperature is (-19.67) degrees Celsius.

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Answer:

v=346.05\ m.s^{-1}

Explanation:

Given:

initial temperature of the lead bullet, T_i=43^{\circ}C

latent heat of fusion of lead, L_f=2.32\times 10^4\ J.kg^{-1}

melting point of lead, T_m=327.3^{\circ}C

We have:

specific heat capacity of lead, c=129\ J.kg^{-1}.K^{-1}

<em>According to question the whole kinetic energy gets converted into heat which establishes the relation:</em>

\rm KE=(heat\ of\ rising\ the\ temperature\ from\ 43\ to\ 327.3\ degree\ C)+(heat\ of\ melting)

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\frac{v^2}{2} =129\times(327.3-43)+23200

v=346.05\ m.s^{-1}

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