Suppose a 952 keV electron and a 615 keV positron (anti-electron) collide and annihilate each other, producing two identical photons. Assuming the process is 100% efficient, find the frequency of these new photons, in Hz. Why must two photons be created?

Q: Why do individuals produce antibodies to antigens they do not have?

A: Answer:- Antibodies are produced by white blood cells called B lymphocytes . When an antigen binds…

Q: caused by blockage--- one or more arteries of the .heart muscle Heart valve defects O Heart attack O…

A:

Q: Are the characteristics of transporters and ion channels are similar? How?

A: Concept used: Ion channels and transporters differ in method of transportation.

Q: Outline the physical activity recommendations for older adults who cannot do the regular adult…

A: We have to outline the physical activity recommendations for older adults who cannot do the regular…

Q: A ball is thrown vertically upward with an initial speed of 80 ft/ sec from the base A of a 50-ft…

A: Given:initial velocity of the ball, u = 80 ft/sheight of the cliff from the base, ho = 50…

Q: How may establishing a strong or healthy skill-related fitness change the way you do housework and…

A: Physical Activities: In one of the greatest studies on physical activity ever conducted, it was…

Q: What is Retardation?

A: Retardation is nothing but a negative acceleration. The velocity of the body may either increase or…

Q: Explain systolic and diastolic blood pressures.

A: Given:  systolic and diastolic blood pressures

Q: otal of 2 ATPS were ga

A: To explain the given statement is true or false,

Q: are some tasks performed by the nervous system

A: Reception of general sensory information (touch, pressure, temperature, pain, vibration) Receiving…

Q: Heredity is the passage of what from parent to offspring?

A: Required : Heredity is the passage of what from parent to offspring

Q: Neuron brain

A:

Q: Which of the following statements about the "greenbeard" effect is correct?     Richard Dawkins…

A: the "greenbeard" effect is a theoretical model of a type of allele for altruistic behavior that…

Q: Which system includes bones,cartilage,and ligaments

A: Which system includes bones , cartilage , and ligaments

Q: Role of mechanics in eating in daily life.

A: The complete eating process requires mechanics. Everything works by motion and movements.  The…

Q: y system and distributed throughout the body Exocrine gland Endocrine gland e nd e yes no We R2…

A: Apply Kirchhoff’s voltage rule at first loop .

Q: Why are home care procedures and follow-up visits required after dental implants?

A: Home care procedures and follow-up visits are required after dental implants because without these…

Q: . A common cause of cardiovascular disease is atherosclerosis, the hardening and narrowing of…

A: The answer to each part has been calculated with explaination.Explanation:

Q: How Myopia effect can be corrected?

A: Myopia (or) Near-sightedness: It is condition in which the object that are near to the eye, are…

Q: VP2. Draw motion diagrams for (a) an object moving to the right at constant speed, (b) an object…

A: here we have to draw motion diagrams of different situations. we sequentially draw these diagrams

Q: What is the purpose of tourniquet in performing phlebotomy?

A: The purpose of tourniquet in performing phlebotomy.

Q: Refer to Multiple-Concept Example 4 for a review of the concepts that play roles in this problem.…

A: Given, a theodolite is calibrated so that it gives the correct value for a distance xc when used at…

Q: Which structures aid in the protecting the brain?

A: The brain is protected by the bones of the skull and by a covering of three thin membranes called…

Q: Name any two thoracic appendages? Zara karo zyadai pahan wazat?

A: We are asked to answer two thoracic appendages

Q: can you explain better? i didnt understand where the 4sin came from nor the values in the…

A: Given question is about propagating wave in x direction. In case of propagating wave, it satisfies…

Q: is a condition in which the pancreas produces too much insulin?

A: Required : In which condition the pancreas produce too much insulin.

Q: How do rods in eyes differ from cones?

A: Retina of our eyes contains light sensitive cells that are rods and cones.

Q: Where does the brain of the electrical system reside?

A: introduction: The majority of people don't appear to view the brain as electric; rather, they…

Q: What makeup whole blood?

A: Answer :- The blood runs through the veins arteries, and capillaries is known as whole blood. It is…

Q: 1. Muscles that you control, such as the muscles in your hand O Voluntary muscles Involuntary…

A: Muscles we can't control are known as  involuntary muscles

Q: The specialized bone cells involve in bone remodeling is O Erythrocytes O Astrocytes Osteoblasts

A: Specialized bone cells involve in bone remodeling is

Q: 3. Is a T-score of -2.2 considered normal, osteopenia, or osteoporosis?

A: The normal T-score lies between -1 to +1.

Q: Where does the brain of the electrical system reside?

A: Our brain is composed of networks of microscopic cells known as neurons, which communicate…

Q: Helicobacter pylori (H. pylori) is a helically-shaped bacterium that is usually found in the…

A: To find out how far the bacterium has moved, we can use the formula for linear distance covered by a…