Half life is a term used to describe  
a) The penetrating ability a gamma source
b) Half the total time a gamma source will be useful
c) The time taken for the gamma source to reduce the strength by half
d) The rate of decay of an X-ray tube

1 Answer

Answer :

c) The time taken for the gamma source to reduce the strength by half

Related questions

Description : Which of X-rays and gamma rays has higher penetrating power ?

Last Answer : The penetrating power of gamma rays is about 100 times greater than that of X-rays.

Description : Which of the following three nuclear radiations is the most penetrating? w) alpha x) beta y) gamma

Last Answer : ANSWER: Y -- GAMMA

Description : Assertion (A) : `beta`-particles have greater penetrating power than `alpha`-rays but less than `gamma`-rays Reason (R ) : `beta`-particles are lighte

Last Answer : Assertion (A) : `beta`-particles have greater penetrating power than `alpha`-rays but less than `gamma`-rays ... . If both (A) and (R ) are incorrect.

Description : The ray with high penetrating power is _____. A. a-rays B. β-rays C. y-rays D. x-rays

Last Answer : ANSWER: A

Description : The least penetrating power ray is – (1) X-Ray (2) a-Ray (3) B-Ray (4) y-Ray

Last Answer : (2) a-Ray Explanation: Since alpha particles are high in ionizing power, it is difficult for them to penetrate matter thoroughly. This is because alpha particles are likely to ionize the first ... power. Beta rays have intermediate; while, Gamma Rays and X Rays have maximum penetrating power.

Description : In radioactive decay, the emission of an electron is characteristic of: w) Alpha decay x) Beta decay y) Gamma decay z) X-rays

Last Answer : ANSWER: X -- BETA DECAY

Description : X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay?

Last Answer : 15 days

Description : 1. Who has the final power to maintain order within the House of People ? 2. X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay? 3. What is ... an important condition for growth of coral? 20. Where was the Arya Samaj setup for the first time in 1875 ?

Last Answer : Answer : 1. Speaker 2. 15 days 3. A drilling ship in Bombay High 4. U.S.A. 5. Cotton textiles 6. Bachendri Pal 7. Nodulated root 8. President 9. Chile 10. Nur Jahan 11. 5 12. ... coast 15. Dayanand Saraswati 16. Chloramphenical 17. Lord Ripon 18. Helium nuclear 19. Wave-free salt water 20. Bombay

Description : Which ray has more penetrating power ?

Last Answer : The penetrating power of gamma rays is much higher

Description : Which of the following has the highest penetrating power? (1) a-ray (2) b-ray (3) y-ray (4) δ-ray

Last Answer : (3) y-ray Explanation: The penetrating power is inversely related to size. Alpha particles, being the largest, penetrate the least. Gamma rays are the most penetrating of the radiations. They are highly energetic waves and are poor at ionising other atoms or molecules.

Description : The least penetrating power ray is

Last Answer : α-rays

Description : Weld decay will cause which of the following problems? a) A reduced resistance to corrosion b) a lower tensile strength c) The toughness is reduced d) The hardness will increase

Last Answer : a) A reduced resistance to corrosion

Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?

Last Answer : Half-life

Description : .In minor oral surgery which is TRUE in regard to antibiotics: a. Amoxil is satisfactory against most oral infection. b. Metronidazole and Amoxil have the same penetrating power. c. It is evident that it will reduce post operative swelling.

Last Answer : a. Amoxil is satisfactory against most oral infection.

Description : In minor oral surgery, what is TRUE in regard to antibiotics: A. Amoxil is satisfactory against most oral infections B. Metronidazole and Amoxil have the same penetrating power C. It is evident that it will reduce post operative swelling

Last Answer : A. Amoxil is satisfactory against most oral infections

Description : A tube can fill a tank completely in 18 hours. After half the tank is filled , one more similar tube is opened. What is the total time taken to fill the tank completely ? A) 14hrs 20min B) 13hrs 30min C) 13hrs 10min D) 14hrs 30min

Last Answer : C A tube can fill the half tank in 9hrs Now another similar tube opened 1/18+1/18 = 2/18 = 1/9 Remaining half tank filled in 4.5hrs Total time = 9+4.5 =13.5 = 13hrs 30min

Description : A tube can fill a cistern in 18hrs.After half the cistern is filled, three more similar tubes are opened. What is the total time taken to fill the cistern completely ? A) 9hrs 52min B) 10hrs 15 min C) 9hrs 45 min D) 10hrs 30min

Last Answer : Time taken to fill half of the cistern = 18/2 = 9 hrs After half the cistern is filled , three more similar tubes are opened. We know that one tube can in 18 hrs can fill = V litres(i.e. fully fill a cistern) ... V/2 will be 2 hrs 15 min Total time = 9 hrs + 2 hrs + 15 min = 11 hrs 15 min

Description : Isobar is produced by the emission of which of the following? (1) X-ray (2) Gamma ray (3) Beta ray (4) Alpha ray

Last Answer : (3) Beta ray Explanation: Isobar, in nuclear physics, any member of a group of atomic or nuclear species all of which have the same mass number-that is, the same total number of protons and ... because either a neutron is converted to a protonor a proton is converted to a neutron in the process.

Description : Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy? A. radio, visible, infrared, ultraviolet, x-ray, gamma ray B. radio, infrared, visible ... -ray, gamma ray D. radio, infrared, visible, ultraviolet, x-ray, gamma ray (Answer)

Last Answer : D. radio, infrared, visible, ultraviolet, x-ray, gamma ray (Answer)

Description : The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: w) ir x) ultra-violet y) rf z) gamma ray

Last Answer : ANSWER: X -- ULTRA-VIOLET

Description : The atomic number of a nucleus will increase by 1 if which of the following is emitted by the nucleus? w) an alpha particle x) a positron y) a beta particle z) a gamma ray

Last Answer : ANSWER: Y -- BETA PARTICLE 

Description : For bactericidal activity,__________ has/have the ability to cause thymine dimer formation. a. X rays b. B ultraviolet light a. Gamma Rays b. Microwaves

Last Answer : b. B ultraviolet light

Description : The life of a wooden sleeper depends upon A. Quality of its timber B. Resistance to weathering C. ability to resist decay D. All the above

Last Answer : D [All the above] Explanation: Indian Railways is divided into 18 zones. Recently added South Coast Railway zones in Indian Railway (2019).

Description : The use of antibiotics can be based on either the clinical course of a patient without the benefit of well-defined microbiologic data (empiric therapy), or targeted at ... which polymicrobial infection is identified, specifically-directed treatment for the predominant organism is satisfactory

Last Answer : Answer: c The use of empiric therapy without the benefit of well-defined microbiologic data is appropriate when there is sufficient clinical evidence to support the diagnosis such that it would ... components of the infection if the body site is such that these microorganisms may be present

Description : Which is the electromagnetic wave ? ① Alpha ray , ② beta ray , gamma ray , ④ cathode ray

Last Answer : Gamma ray electromagnetic waves.

Description : What is gamma ray ?

Last Answer : Gamma ray is a type of electromagnetic wave emitted by nuclear explosion and radioactivity The gamma ray was discovered in 1900 by the French chemist and physicist Paul Willard. It is expressed by. Gamma rays are emitted from the sun.

Description : What is the religion of gamma ray ?

Last Answer : ( 1) Gamma rays are electromagnetic waves of very short wavelength. (2) Gamma rays have no mass. (3) Gamma rays have no charge. (4) The wavelength of gamma ray is much less than the ... like light. Gamma ray has all the luminous properties like reflection , refraction , excitation , refraction etc.

Description : What is the speed of gamma ray ?

Last Answer : Gamma ray speed 3 X 108ms-1

Description : What is the mass of gamma ray ?

Last Answer : Gum ray mass 9.11 x 10-31kg

Description : What is the speed of gamma ray equal to what speed ?

Last Answer : The speed of gamma ray is equal to the speed of light

Description : What is the wavelength of gamma ray ?

Last Answer : The wavelength of gamma rays is short

Description : Find the minimum energy that a `gamma`-ray must have to give rise to an electron -positron pair. `{:("Mass of electron",= 0.00055 am u,),("Mass of pos

Last Answer : Find the minimum energy that a `gamma`-ray must have to give rise to an electron -positron pair. `{:("Mass ... ("Mass of positron",= 0.00055 am u,):}`

Description : What is a gamma-ray burst, and how does it happen?

Last Answer : It happens when two gamma rays come from different stars and collide and make a big explosion . A gamma ray burst is when two gamma rays come from different stars and collide and make a big explosion. BOOM

Description : The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: A. I r B. ultra-violet C. r f D. gamma ray

Last Answer : B. ultra-violet

Description : The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years. (A) 24 (B) 18 (C) 6 (D) 36

Last Answer : (B) 18

Description : Pick out the correct statement. (A) Positron is the antiparticle of electron (B) In α-decay, the ratio of neutron to proton decreases (C) Ionising power of β-rays is higher than that of α-rays (D) Speed of α-rays is more than that of γ-ray

Last Answer : (A) Positron is the antiparticle of electron

Description : If the relation between time of decay (t) and half life period `(t_(1//2))` is `(t = 4 t_(1//2))`, the relation between r and mean life (T) is:

Last Answer : If the relation between time of decay (t) and half life period `(t_(1//2))` is `(t = 4 t_(1//2))`, the ... `27^(4)` In 2 C. 4 T In 2 D. 2T In 2

Description : The time required for half of the __________ of a radioactive isotope to decay is called its half life. (A) Nuclei (B) Electrons

Last Answer : (A) Nuclei

Description : Estimation of gamma glutamyl transferase is useful to detect which condition?

Last Answer : Alcohol abuse.

Description : What is the half-life of the Rubidium-87 / Strontium-87 decay chain?

Last Answer : http://answers.yahoo.com/question/index?qid=20091020104308AAsZVxB Rb 87 half life = 5*10^11 years Sr 87 half life = 2.83 hours

Description : Can the decay half-life of a radioactive material be changed? -Physics

Last Answer : Yes, the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of ... radiometric dating are so accurate because decay half-lives in nature are so close to constant.

Description : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// lambda` and `t_(1//2) = 0.693//lamb

Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// ... `tau = (t_(1//2))/(0.693)`

Description : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// lambda` and `t_(1//2) = 0.693//lamb

Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process ... on the amount of element not yet decayed

Description : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// lambda` and `t_(1//2) = 0.693//lamb

Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1 ... B. 53 yrs C. 530 yrs D. 5300 yrs

Description : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// lambda` and `t_(1//2) = 0.693//lamb

Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay ... exponentially C. parabolically D. all of these

Description : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// lambda` and `t_(1//2) = 0.693//lamb

Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay ... lambda` depend on the nature of radioactive element

Description : What is the half life of 3 g sample of radioisotope that decay to 0.75 g in 30 days?

Last Answer : 15 days

Description : How can biofilms can be useful? a. preventing tooth decay b. keeping surgical sites sterile c. bioremediation d. A-C are correct

Last Answer : c. bioremediation

Description : To reduce tooth decay most toothpastes contain a – (1) Bromide (2) Fluoride (3) Iodide (4) Chloride

Last Answer : (2) Fluoride Explanation: Fluoride in toothpastes prevent tooth, decay from progressing and can even reverse, or stop, early tooth decay. It works by promoting a chemical reaction in tooth enamel ... itself into enamel weakened by acid attack, making the tooth more resistant to future acid attacks.

Description : Which of the following is true in relation to dental decay? A. Foods that require vigorous mastication will increase salivary flow and reduce PH B. Tooth brushing immediately after meals is most ... E. The Stephan Curve describes an increase in PH during a meal with resultant of demineralisation

Last Answer : E. The Stephan Curve describes an increase in PH during a meal with resultant of demineralisation