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2 years ago

(100 POINTS AND BRAINLIEST)

1 answer:

4 0

${\huge{\fcolorbox{yellow}{red}{\orange{\boxed{\boxed{\boxed{\boxed{\underbrace{\overbrace{\mathfrak{\pink{\fcolorbox{green}{blue}{Answer}}}}}}}}}}}}}$

0.72 liters

Explanation:

$\sf Volume \: before \: heated(V_1) = 0.5l \\ \\ \sf Temperture \: before \: heated(T_1) = 20{ \degree} C = 20 + 273.15 = 293.15K \\ \\ \sf Volume \: after \: heated(V_2) = ? \\ \\ \sf Temperature \: after \: heated(T_2) = 150{ \degree}C = 150 + 273.15 = 423.15K$

$\textsf{By using Charles's law} \\ \\ \tt{ \frac{V_1}{T_1} = \frac{V_2}{T_2} }$

$\sf Now \: sustituting \: the \: values$

$\sf \longmapsto \frac{0.5}{293.15} = \frac{V_2}{423.15} \\ \\ \\ \sf \longmapsto \frac{0.5 \times 423.15}{293.15} = V_2 \\ \\ \\ \sf \longmapsto \frac{211.575}{293.15} = V_2 \\ \\ \\ \boxed {\longmapsto 0.72l = V_2}$

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<u>6.87 ft/s</u> is the rate at which the top of ladder slides down.

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Plug in $h=8$ in equation (1) and solve for $b$ . This gives,

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