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nika2105 [10]
4 years ago
11

Which of these is the best description of the Frye Standard?

Physics
2 answers:
ivanzaharov [21]4 years ago
6 0
Number 1 is D) <span>Deciding if the procedure, principles or techniques in question in a forensic case are generally accepted by the relevant scientific community.</span>
trasher [3.6K]4 years ago
3 0

Answer:

1. Option D) Deciding if the procedure, principles or techniques in question in a forensic case are generally accepted by the relevant scientific community.

2. Option A) thin-layer chromatography

3. Option A) when the jury considers the verdict

Explanation:

1. The Frye Standard is a procedure to determine if the piece of evidence is admissible in a court of law. This is a rigorous test to test how well the evidence can be used against a criminal or prove a case in the court of law. This came after a ruling that an experts advice only was insufficient to prove a case.

2. Thin layer chromatography is used to separate the ink components. This is because the ink is made of different components that have different volatlitities and solublies in the alcohol solution. The inks can be compared by looking at the partitioning coefficient and comparing the two distances traveled by the components.

3. The guilty cannot plead a case when the verdict has been given. At that moment, the case is closed.

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The Curiosity rover now on Mars analyzed rocks and found magnesium to have the following isotopic composition.
emmasim [6.3K]

Answer:

A.   number of neutrons of Magnesium Mg = 13

B.   The average mass of Mg = 22.29 amu

C.   the magnesium composition on Mars is not the same as that on Earth.

Explanation:

Isotopes are atoms with the same atomic number but different mass number. This is due to the difference in mass of the neutrons.

The atomic number of Magnesium Mg = 12

The atomic number of an element is the number of protons present in the atomic nucleus of the element

i.e Atomic number = number of protons = 12

The mass number of an element is the sum of the protons and neutrons in the atomic nucleus of the element.

Mass number = number of protons + number of neutrons

Given that the mass number of Mg = 25

Then;

25 = 12 + number of neutrons

25 - 12 = number of neutrons

13 = number of neutrons

number of neutrons of Magnesium Mg = 13

B. What is the average atomic mass of magnesium in these rocks?

The average atomic mass of an element which exhibit isotopy is the average mass of its various isotopes as they occur naturally in any quantity of the element.

Therefore the average atomic mass of magnesium can be calculated as:

= \mathtt{\dfrac{(23.9872 \times 79.70) + ( 24.9886 \times  10.13) + (25.9846 \times  10.17) }{79.7 + 10.13 +10.17}}

= \mathtt{\dfrac{(1911.77984) + ( 53.134518) + (264.263382) }{100}}

= \mathtt{\dfrac{2229.17774 }{100}}

The average mass of Mg = 22.29 amu

C. Is the magnesium composition on Mars the same as that on Earth? Explain.

The average atomic weight of magnesium on Earth is said to be 24.305 amu while that of Mars is 22.29 amu.

There difference in the average atomic weight result into difference in their composition. Therefore,the magnesium composition on Mars is not the same as that on Earth.

7 0
3 years ago
What is the maximum number of f orbitals that are possible in a given shell?
Lemur [1.5K]

Answer: seven f orbitals

Explanation:

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3 years ago
Which one of these exercises gets your heart pumping? *
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Answer:

swimming

Explanation:

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The pressure, P, of a gas varies directly with its temperature, T, and inversely with its volume, V, according to the equation f
lbvjy [14]
The equation formula:
P V = n R T
1,245 * 2 l = n R * 300 K
n R = 1,245 * 2 : 300 = 8.3
P * 2.5 l = n R * 400 K
P * 2.5 = 8.3 * 400
P = 3,320 : 2.5 = 1328 J
Answer:  A ) 1,328 joules.
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3 years ago
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What can geologist infer from the rounded and eroded shapes of the Appalachian Mountain
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<span>The answer is D. mountains have been eroding for millions of years. The Appalachian Mountains is an older group of fold mountains. It is much older than the Himalays that do not exibit this rounded shape. As tectonic forces enable mountain building, forces of weathering, erosion and mass wasting are constantly eating away at them. </span>
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