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2 years ago

12

Allison is analyzing the fracture pattern of a window. She sees that the fracture lines encircle the point of impact. What type

of fracture lines are
these?

1 answer:

Ray Of Light [21]2 years ago

3 0

Answer:

Concentric

Explanation:

I’m pretty sure but I’ll let you know for sure when I’m done with the test

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What do you call the things in an experiment that must be the same to make it fair

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controlled variables

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3 years ago

A gas with 4.0 atmospheres of pressure has a temperature of 27°C.

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Answer:

7.462

Explanation:

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The first excited vibrational energy level of diatomic chlo- rine (Cl2) is 558 cm^-1 above the ground state. Wave- numbers, the

Usimov [2.4K]

Answer:

The answer is "0.0000190 and 2.7 J".

Explanation:

$\to P_4=\frac{e^{-\beta}(4+\frac{1}{2}) hev}{2vb}\\\\$

$=\frac{e^{-9(1.35)}}{0.278v}\\\\=\frac{e^{-12.5}}{0.278}\\\\=\frac{0.000005285}{0.278}\\\\=0.0000190$

Given:

$h=6.626 \times 10^{-34}\\\\c=3\times 10^{10}\\\\v=558\ cm^{-1}\\\\K=1.38 \times 10^{-23}\\\\ T=298\\\\$

$E=\frac{hcv}{KT}\\\\$

by putting the value into the above formula so, the value is 2.7 J

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2 years ago