Why are bullets shot into a barrel of water for testing?

Biology

1 answer:

soldi70 [24.7K]3 years ago

8 0

Answer:

One of these specifications is a characteristic known as rifling, which refers to the spiral lands and grooves placed into the firearm's barrel to impart a spin on the bullet for accuracy. ... Examiners generally test fire into a water recovery tank to obtain comparison bullets for evaluation under the microscope.

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How do the structures in an organism relate to their functions?

Karo-lina-s [1.5K]

Different structure in an organism are specialized to perform different tasks in the organism depending on their makeup. A few examples are:

Heart, veins, arteries are structures forming the cardiovascular system and function is to facilitate transport nutrients and oxygen carried by blood all over the body.

Bones, joints, ligaments and cartilage are structures of the skeletal system and their function is support and protection of the body.

Mouth, esophagus. stomach, large and small intestines are structures of the digestive system and their function is to break down food and absorb nutrients.

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2 years ago

Which state of matter consists of ionized particles? solid liquid gas plasma

Radda [10]

The correct answer is option D, Plasma

Plasma is the condition where a hot gas is ionized. It consists of equal numbers of positive and negative ions. It is an electrically conducting environment which is considered as the fourth state of matter. Plasma gases are affected by electric and magnetic waves as compared to the neutral gases (which remain unaffected by electric and magnetic wave) due to the presence of negative and positive ions.

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2 years ago

Read 2 more answers

Which of the following reasons explains a possible advantage of using adult stem cells in therapeutic cloning rather than embryo

denis23 [38]

The answers are A and d

6 0

3 years ago

Which of the following does NOT characterize proteins?

8090 [49]

Answer:

The answer is C) They appear to be the molecular carriers of coded hereditary information.

Explanation:

Why NOT C) They appear to be the molecular carriers of coded hereditary information?

This is the job of the nucleic acids. It is composed of nucleotides which are the basic units of DNA and RNA. They carry genetic information about a certain organism.

<h3 /><h3>True of proteins:</h3>

A) They may be denatured or coagulated by heat or acidity.

Denaturation is the destruction of the protein's secondary and/or tertiary structures. The primary structure is not disrupted due to the tough peptide bonds and can only be broken down by acid. For heat denaturation, hydrogen bonds are destroyed, as in cooking of egg whites and medical equipment sterilization.

B) They have both functional and structural roles in the body.

There are many kinds of proteins that have functional and structural roles like hormones (FSH, LH), antibodies (IgA, IgM), enzymes (lipase, amylase), for storage/transport (hemoglobin, ferritin), and locomotion (actin, troponin).

D) Their function depends on their three-dimensional shape.

Just like hemoglobin, it's quaternary structure can carry 4 molecules of iron in one go. Enzymes are shaped accordingly to fit a specific substrate (lock-and-key model)

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3 years ago

3. How would you date a sample of rock that you suspect as being one of the earliest on Earth? (1 point)

Kay [80]

If I were attempting to date a rock sample that I suspect to be incredibly old, i would use radioactive isotopes with a long half life. When dating rocks and fossils to discover approximately how old they are, radioisotope dating is used on igneous rocks found near fossils. Things like Uranium 235, which is an unstable radioactive isotope of elements, decays at a constant rate over time so can be useful in determining age.

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3 years ago