Which is one common use of neutron activation analysis A. Assessing the function of body organs such as the thyroid
B. Killing cancerous cells
C. The transmutation of hydrogen into helium
D. Detecting art forgeries

Answers

Answer 1

Answer:

Detecting art forgeries is one common use of neutron activation analysis. Hence, option D is correct.

What is neutron activation analysis?

NAA is a non-destructive analytical technique that can be used to determine the elemental composition of a sample.

It is particularly useful for the analysis of trace elements, as it is highly sensitive and can detect even very small amounts of elements.

In the field of art conservation, NAA is used to analyze the composition of pigments and other materials used in artworks, which can help to authenticate or identify forgeries.

Neutron activation analysis is a highly versatile and powerful analytical technique that can provide valuable insights into the elemental composition of a wide range of samples. Its sensitivity and accuracy make it an important tool in many scientific fields, including art conservation.

Thus, option D is correct.

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Answer 2

Answer: b killing cancerous cells

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Calculate the mass in grams of a sample of Americium containing six atoms

Answers

Answer: $243* 10^(-23)$ grams

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023* 10^(23)$ of particles. and weighs equal to the molecular mass.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given atoms}}{\text {Avogadro's number}}=(6)/(6.023* 10^(23))=1.0* 10^(-23)moles$

1 mole of Americium weighs = 243 g

Thus $1.0* 10^(-23)moles$ of Americium weigh= $(243)/(1)* 1.0* 10^(-23)=243* 10^(-23)g$

Thus the mass mass in grams of a sample of Americium containing six atoms is $243* 10^(-23)$

The mass (in grams) of the sample of Americium containing six atoms is 2.42×10⁻²¹ grams

How to determine the mass of Americium containing six atoms?

First, we shall obtain the mole of americium that contains six atoms. This is illustrated below:

From Avogadro's hypothesis,

6.022×10²³ atoms = 1 mole of americium

Therefore, we can say that

6 atoms = 6 / 6.022×10²³

= 9.96×10⁻²⁴ mole of americium

Finally, we shall determine the mass (in grams) of the americium. Details below:

Mole of americium = 255163.41 moles
Molar mass of americium = 243 g/mol
Mass of americium = ?

Mass of americium = Mole × molar mass

= 9.96×10⁻²⁴ × 243

= 2.42×10⁻²¹ grams

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Which of the following occurs over a small area and is a local wind.

Answers

Answer:

the answers are

100% correct

Explanation:

A. Local winds occur over a small area, while global winds occur over a large area.

B. Local winds blow in from the ocean, while global winds do not.

C. Local winds are considered breezes, while global winds produce mostly storms.

D. Local winds are created by the unequal heating of Earth's surface, while global winds are produced by polar temperature zones.

Answer for this is B, meanwhile local wings are created by the unequal heating of earths surface, while global winds are produced by polar temperature zones. Hope this helps!

PLEASE HELP I NEED AN ANSWER WITHIN 10 MINUTES (this is a 15 pt. question)Determine the mechanical energy of this object: a 1-kg ball sits on a 10-meter high cliff.

980 J

98 J

10 J

The ball isn't moving, so the mechanical energy is zero.

Answers

The answer to this question is 98 J

I think, 98 J is the answer.

Which scientist performed the cathode ray experiment leading to the discovery of electrons?A.
Dalton
B.
Rutherford
C.
Democritus
D.
Bohr
E.
Thomson

Answers

Answer:

The scientist is E. Thomson.

Explanation:

In the late nineteenth century, physicist J.J. Thomson started trying different things with cathode beam tubes. Cathode beam cylinders are fixed glass tubes from which the greater part of the air has been emptied. A high voltage is applied crosswise over two terminals toward one side of the cylinder, which makes a light emission stream from the cathode (the contrarily charged anode) to the anode (the emphatically charged cathode).

The cylinders are called cathode beam tubes on the grounds that the molecule bars or “cathode beam” begins at the cathode. The beam can be distinguished by painting a material known as phosphors onto the most distant finish of the cylinder past the anode. The phosphors sparkles, or produces light, when affected by the cathode beam.

Explain how kidneys remove waste from the body and keep fluids and salts in balance

Answers

The fluid levels in the body must be balanced and a normal blood pressure must be maintained. An area in the brain, the hypothalamus, constantly watches the amount of water in the blood. When the brain discovers too much water in the blood, the hypothalamus releases a less amount of a specific hormone. This lets the kidneys know to return less water to the blood and to increase the quantity of urine that is excreted.

When you mix the primary colors of light, you produce what color?