3 years ago

Which one of the following tin-lead soldiers has the lowest melting point? A. 60/40 B. 70/30 C. 40/60 D. 50/50

1 answer:

3 0

There is an inverse relation between the tin in the tin-lead ratio and the melting point of the soldier, this means that as the amount of tin increases in the tin-lead ratio, the melting point decreases and vice versa.
Based on this, the soldier with the lowest melting point is the one with the highest tin ratio.
Answer : (B) 70/30

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A cylindrical can has a volume of 2in^(3). Express the surface area of the can as a function of its radius,r.

noname [10]

$V=2 \text{ in}^3\\
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h=?\\\\
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h=\dfrac{2}{\pi r^2}\\
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\boxed{A=2\pi r^2+\dfrac{4}{r}}
 
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