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just olya [345]
2 years ago
9

When a metal such as copper is heated it expands. Explain

Chemistry
1 answer:
exis [7]2 years ago
6 0

Explanation:

When a metal is heated the kinetic energy in the particles increases and hence the force of attraction decreases amongst the particles - as electrons try to escape due to kinetic energy. This causes the metal to expand.

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Sphinxa [80]
The answer is D. Proteins. I know because I tried C. and I got it wrong. It was my last attempt on the quiz, and since I got it wrong they showed me the answer. (i like ur prp btw) 
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The hydrogen-line emission spectrum includes a line at a wavelength of 434 nm. What is the energy of this radiation? (h= 6.626 x
Andrews [41]
Wavelength = 434nm = 434 x 10⁻⁹m
planck's constant = <span>h= 6.626 x 10 ⁻³⁴ J
E =?
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value for c is 3 x 10⁸ m/s
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Explanation:

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8 0
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In-s [12.5K]

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\boxed{\text{exhaust stroke}}

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\text{The cylinder releases CO$_{2}$, CO, and H$_{2}$O during the }\boxed{\textbf{exhaust stroke}}

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A change in color indicates that what has occurred?
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