What are the minimum energies of the two oppositely directed gamma rays in a pet procedure?.

Answers

Answer 1

Answer:

0.51 1 MeV

Explanation:

-mec2 is the rest energy of the electron (0.511 MeV)

-Pair production and triplet production are followed by the annihilation of the positron with a ‘free’ electron producing two annihilation quanta, most commonly with an energy of 0.511 MeV each and emitted at 180º from each other to satisfy conservation of energy, momentum and charge.


Related Questions

In the following sentence, what does the word “lush” mean? Describe the context clue strategies you can use. “Due to the nearly constant rain, the Hoh Rain Forest is very lush, green, and slippery all year round.”

Answers

The word “lush” means growing luxuriantly. Context clues given are “due to the constant rain”, “green, and slippery all year round”

How would this hypothesis be different from a scientific law? Review the definitions of law and hypothesis to help you. (2 points)

Answers

A hypothesis is a potential explanation of a narrow phenomenon; a scientific theory is an in-depth explanation that applies to a wide range of phenomena. A law is a statement about an observed phenomenon or a unifying concept, according to Kennesaw State University.

Examine the process represented in the diagram.

Which choice best describes what is occurring at step B?

Two strands of DNA form a double helix.
DNA and proteins form tight coils.
DNA wraps around histones.
Coils of DNA and proteins wind into larger coils.

Answers

Process of Chromosome Creation

The Process of Chromosome Creation is as follows:

First is the forming of a double helix by 2 strands of DNANext is the wrapping around of 8 Histones with DNA.Then, the wrapping of Histones with Nucleosome Arrays (aka The "Tight Coil" Step).Finally, the Coils of DNA and proteins wind into larger coils.

Answer:

DNA wraps around histones.

I am accepting any correction if I accidentally stated false information :).

P.S. I'm just in my 9th grade :D (I tried my best to explain this, I hope this helped you)

#learnwithbrainly

Hi I know this is quite a few question but I really need help, Thanks!

Answers

3: B

4: B

5: C

6: C

7: A

8: C

9: C

10: D

11: B

12: D

Sorry for the late responce, I was on holiday !! (▱˘◡˘▱)

Think Critically On what single energy source do most energy
alternatives depend, either directly or indirectly?

Answers

Answer:

The sun is the single energy source the most alternatives depend, either directly or indirectly.

Match the following terms and definitions.

1. controls what moves in and out of the cell
cytoplasm
2. control center of the cell
cell wall
3. large storage structure
nucleus
4. all cellular material outside the nucleus
organism
5. functional plant or animal
vacuole
6. outer covering around a plant cell; made of fibrous material
plasma membrane
7. small, dark structure within the nucleus of a cell; makes r-RNA to construct the ribosomes
nucleolus

Answers

Answer:

okay so....

1. plasma membrane

2. nucleus

3. vacuole

4. cytoplasm

5. organism

6. cell wall

7. nucleolus

Some enzymes act with the assistance of a non-protein component. This component is called a ; if that component is an organic molecule it can be called a

Answers

Some enzymes act with the assitance of a non-protein component and this component is called : Cofactor  If the component is an organic molecule it can be called a : Coenzyme

What are Enzymes

Enzymes are proteinous organic catalyst present in living organisms that regulates/determines the rate at which a chemical reaction occurs in an organism, but  not used up in the process. A no-protein component that assists an enzyme in the process is known as a cofactor.

Hence we can conclude that ome enzymes act with the assitance of a non-protein component and this component is called : Cofactor If the component is an organic molecule it can be called a : Coenzyme.

Learn more about Enzymes : https://brainly.com/question/1596855

Which Action has the least impact on the environment

Answers

Answer: C. Using a safe fountain for clean drinking water

Explanation:

         Since all the other options will have some sort of impact on the environment via waste, the correct answer to your question is using a safe water fountain.

         There won't be anything to throw away, short-term or long-term, from you so it's the least impact.

do transported soil have different types of grain particles?

Answers

Answer:

Probably Yes

Explanation:

It's being moved so the other particles are most likely being lost so i would say, yes


What happens to the rate of diffusion if the temperature is raised?

Answers

Answer:

The rate of diffusion increases

Explanation:

This is because increase in temperature causes increase in the average speed of molecules which increases the rate of diffusion

Answer:

The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. The greater the surface area, the faster the rate of diffusion.

According to the second law of thermodynamics, heat energy released by an organism is _____.

absorbed by plants for photosynthesis
used by another animal
gone forever
released into the environment and unusable

Answers

Answer:

released into the environment and unusable. (Entropy)

Explanation:

Answer: released into the environment and unusable

Explanation:

have a good day

answer this question i will give u brainliest

Answers

Answer:

50%, and 0%

Explanation:

Make a chart, and fill it in
a)
_ |E   |   e
e |Ee | ee
e |Ee | ee
2/4 have Ee, and 2/4 have ee, ee is the attached, so the chance is 2/4, or 50%
b)
hom*zygous means that both letters are the same, so EE, or ee
the mother is EE, while the father is ee
make a table:
_ |E   |   E
e |Ee | Ee
e |Ee | Ee
As you can see, it's all Ee, so the only possibility is for the child to have detached earlobes, and no attached earlobes are produced (in theory, at least)

The space that lies between the dura mater and the periosteum of the vertebrae, and houses areolar connective tissue, blood vessels, and adipose connective tissue is the ___________ space.

Answers

The answer is the epidural space

The complement cascade and its by-products contribute to:.

Answers

The complement cascade and its by-products contribute to

Both triggering inflammation and attracting phagocytes to sites of infection

What is one part of the DNA molecule that changes?

Answers

The base or nitrogenous base.

Which best describes how a diet with low carbohydrate intake would affect glucose levels and cellular respiration?

A. Glucose levels would decrease, and cellular respiration would decrease.

B. Glucose levels would increase, and cellular respiration would decrease.

C. Glucose levels would increase, and cellular respiration would increase.

D. Glucose levels would decrease, and cellular respiration would increase. ​

Answers

Answer:

A

Explanation:

After being digested carbohydrates are broken down into glucose so there would be a decrease in glucose levels. Glucose is needed for cellular respiration so it would also decrease

It is illegal to harm manta rays.

Answers

yes it’s illegal to do that

how about this question? its biologoy

The "language" of RNA is called the
Choose...
, and it uses three-letter "words" called
Choose...
.

Answers

Answer:

I don't see anything listed, provide an image or equation

Explanation:

What is the term when a cell divides into two new daughter cells?
A. cell birthing
B. cell death
C. cell regeneration
D. cell division​

Answers

Answer:

D, cell division.

fleas are insects but they do not have wings. suggest two features of fleas that would show that they should be classified as insects.

Answers

Answer:

Antennae and 6 legs

Explanation:

what positioning error has occurred when the pedestals are visualized posteriorly on the oblique lumbar spine projection

Answers

Answer:

fractures that occur in adolescent athletes who experience sudden, forceful, or unbalanced contractions of the tendinous and muscular attachments,

Explanation:

List the types of enzymes made in the salivary glands, the stomach, the pancreas and the small intestine. ​

Answers

Answer:

Lipase breaks down lipids, which are fats and oils, into glycerol and fatty acids.

Amylase. Amylase is produced mostly in the pancreas, but also in the salvary glands and small intestine. ...

Protease. Protease is produced in the stomach, pancreas, and small intestine. ...

Lipase.

Explanation:

Answer:

amylase, lipase, protease, and nuclease.

Explanation:

The main categories of enzymes are amylase, lipase, protease, and nuclease. Glands in the mouth, stomach, small intestine, and pancreas secrete some or all of these as food passes along the digestive tract so that it may be broken down and used by the body.

someone please please help me with this !!

Answers

Bacteria is growing at a faster rate then humans

Measure of hydration, which tests how quickly the skin returns to its normal position after being pinched

Answers

Answer:

Skin turgor

Explanation:

refers to how quickly your skin returns to its normal position after being pinched. It’s often used to check for dehydration in children and older adults.

A student is asked to draw a food web in which the same organism is a primary consumer as well as a secondary consumer. How should the organism be represented in the food web?.

Answers

Answer:

The primary producers (grass, flowers, weeds) should be at the bottom because they are then eaten by primary consumers (rabbits, mice, squirrels). The secondary consumers would be on top (owls, eagles, hawks) because they eat the primary consumers.

Example:

Eagle

  ^

Mouse

  ^

Grass

Have an amazing day!!

Please rate and mark brainliest!!

To meet the definition of polyuria, the minimum daily output of urine is __________.

Answers

The minimum is 2.0L of urine

How do you think the body language that wolves use with other wolves compares to what they use with humans? HELP PLS

Answers

Answer: BODY LANGUAGE. Body Language cont’d from The Language of Wolves. In a wolf pack, order is regularly reinforced by displays of dominance and submission through a complex mix of vocal and physical communications. n a wolf pack, order is regularly reinforced by displays of dominance and submission through a complex mix of vocal and physical communications. Wolves employ a variety of non-vocal forms of communication to express and maintain their status,In a wolf pack, order is regularly reinforced by displays of dominance and submission through a complex mix of vocal and physical communications. Wolves employ a variety of non-vocal forms of communication to express and maintain their status,

Explanation:

Answer:

Communication is especially important for animals, like wolves, that live together in family groups, where coordinating, cooperating, and reinforcing bonds and status are all part of a necessary daily routine. Within a family of wolves, communication helps maintain social stability. It helps to reinforce pack solidarity and enables the opportunity for young pack members to learn information specific to the pack and how to survive.

Communication is also used to express an individual’s intentions or emotional disposition or feelings. As with any highly social animal, communication amongst wolves is particularly complex and involved and it is vital to keeping the family functioning together as one. Wolves do use a range of vocalizations to “talk” to one another and express themselves.

Explanation:

Hope its helpful

Which of Mendel’s laws or principles state that gametes carry one allele for each trait?

Answers

good luck to your modules

If you know this help please !!

Answers

Answer:

shipping

Explanation:

Some invasive species obviously can't swim. Others cannot walk either. MOst are spread by human activity.

A. Shipping cause it makes more sense and i couldn’t agree more with what the other person answer Hope this helps.

Katie needs to measure water for a recipe she is using to cook dinner. She should measure the liquid in __.

options:
inches
pints
pounds
yards

Answers

pints is the right answer; inches and yards are measurements of distance, and pounds are a measure of weight for solid objects.

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