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Olin [163]
3 years ago
15

What makes bullet holes wider on the exit side of a piece of glass?

Chemistry
2 answers:
denpristay [2]3 years ago
6 0
The rounded shape of the bullet because as it goes through the glass it stops spinning and this make the hole wider
il63 [147K]3 years ago
6 0

Answer:

The correct answer is "The arc, or trajectory, of the bullets path".

Explanation:

During forensic examination, glass fracture analysis helps to understand the position of the attacker by analyzing how a bullet penetrated the glass. One way to understand this is by seeing where the bullet holes are narrower. Usually, bullet holes wider on the exit side of a piece of glass, which is explained by the arc, or trajectory, of the bullets path. Therefore the narrower site of the hole indicates the position at which the bullet entered the glass, and the wider site indicates the position at which the bullet exit the glass.

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Calculate the molality of a solution that contains 51.2 g of naphthalene, C10H8, in 500 mL of carbon tetrachloride. The density
PtichkaEL [24]

<u>Answer:</u> The molality of naphthalene solution is 0.499 m

<u>Explanation:</u>

Density is defined as the ratio of mass and volume of a substance.

\text{Density}=\frac{\text{Mass}}{\text{Volume}} ......(1)

Given values:

Volume of carbon tetrachloride = 500 mL

Density of carbon tetrachloride = 1.60 g/mL

Putting values in equation 1, we get:

\text{Mass of carbon tetrachloride}=(1.60g/mL\times 500mL)=800g

Molality is defined as the amount of solute expressed in the number of moles present per kilogram of solvent. The units of molarity are mol/kg. The formula used to calculate molarity:

\text{Molality of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Mass of solvent (in g)}} .....(2)

Given values:

Given mass of naphthalene = 51.2 g

Molar mass of naphthalene = 128.17 g/mol

Mass of solvent = 800 g

Putting values in equation 2, we get:

\text{Molality of naphthalene}=\frac{51.2\times 1000}{128.17\times 800}\\\\\text{Molality of naphthalene}=0.499m

Hence, the molality of naphthalene solution is 0.499 m

4 0
2 years ago
How does potassium ions behave when current is passed through the electoryte
Mariana [72]
An electrolyte<span> is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water. </span>
3 0
2 years ago
Which model failed to explain the
11Alexandr11 [23.1K]

Answer:

C). The Bohr-Rutherford model

Explanation:

The 'Bohr-Rutherford model' of the atom failed to elaborate on the attraction between some substances. It essentially targeted hydrogen atoms and failed to explain its stability across multi-electrons. The nature and processes of the chemical reactions remained unillustrated and thus, this is the key drawback of this model. Thus, <u>option C</u> is the correct answer.

5 0
3 years ago
Which rock type(s) could be transformed into sediment?
iVinArrow [24]

Answer:

b!

Explanation:

4 0
3 years ago
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Evaporite. Gypsum (Mineral) and Halite (Rock Salt) are examples of evaporites. Usually Gypsum forms first and then Halite.
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2 years ago
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