A. In which of the following is the number of radioactive decays per minute larger: 1....
A. In which of the following is the number of radioactive decays per minute larger:
1. a large sample of undecayed atoms?
2. a small sample of undecayed atoms?
Homework Answers
We know that the radioactive decay law states that the probability per unit time that a nucleus will decay is a constant, independent of time.The radioactive decay of certain number of atoms (mass) is exponential in time. Radioactive decay law: N = N.e-λt. The rate of nuclear decay is also measured in terms of half-lives.So radio active decays is larger for a large sample of undecayed atoms.since their half life is more.
a :a large sample of undecayed atoms.
Add Answer to:
A. In which of the following is the number of radioactive decays
per minute larger:
1....
A) A radioactive material produces 1220 decays per minute at one time, and 4.2 h later...
A) A radioactive material produces 1220 decays per minute at one time, and 4.2 h later produces 150 decays per minute. What is its half-life? B) What fraction of a sample of 6832Ge, whose half-life is about 9 months, will remain after 3.5 yr ? C) What is the activity of a sample of 146C that contains 7.0×1020 nuclei? The half-life of 146C is 5700 years.
Er counts the number of decays from a radioactive sample ina e interval Δt from a radioactive sou...
could you do and explain part a
er counts the number of decays from a radioactive sample ina e interval Δt from a radioactive source, starting at time t 0, The limiting n for this kind of experiment is the exponential distribution (5.69) wthere T is a positive constant. (a) Sketch this function. The distribution is zero for ent begins only at 0.) (b) Prove that this function satisfies the normalization condition (5.13). () Find the mean time T at...
Two samples of a radioactive materal each contain No atoms at time t = 0. At...
Two samples of a radioactive materal each contain No atoms at time t = 0. At later times the number of undecayed atoms in sample A is: Na = Noe^-20t and for sample B is: Nb = Noe^-10t Which sample decays more rapidly? Explain your answer.
As a radioactive specimen decays, its activity decreases exponentially as the number of radioacti...
I only need help with part c). Thanks!
As a radioactive specimen decays, its activity decreases exponentially as the number of radioactive atoms diminishes. Some radioactive species have mean lives in the millions (or even billions) of years, so their exponential decay is not readily apparent. On the other hand, many species have mean lives of minutes or hours, for their exponential decay is easily observed. According to the exponential decay law, the number of radioactive atoms that remain after...
A 0.0116-g sample of a radioactive isotope with a half life of 1.3x109 years decays at...
A 0.0116-g sample of a radioactive isotope with a half life of 1.3x109 years decays at the rate of 2.9x104 disintegrations per minute. Calculate the molar mass of the isotope. Enter your answer in scientific notation. (g/mol)
If a radioactive isotope has half-life h, then the number of atoms in a sample is...
If a radioactive isotope has half-life h, then the number of atoms in a sample is given by a(t)=a-2-/h where ao gives the number of atoms in the sample at time 0. The radio active decay of carbon-14 leads to clever way of determining the age of fossils and remnants of plants and animals. When an organism dies, the radioactive carbon- 14 in it decays, with half of it gone in 5,730 years. a. Suppose a mummified cat has a...
A radioactive sample is monitored with a radiation detector to produce 6640 counts per minute. Twelve...
A radioactive sample is monitored with a radiation detector to produce 6640 counts per minute. Twelve hours later, the detector reads 1310 counts per minute. 1)Calculate the decay constant of the sample. (Express your answer to two significant figures.) (in h^-) 2)Calculate the half-life of the sample. (Express your answer to two significant figures.) (h)
11. A small quantity of solution containing 24Na radionuclide (half life 15 hours) of activity 1....
11. A small quantity of solution containing 24Na radionuclide (half life 15 hours) of activity 1.0 microcurie is injected into the blood of a person. A sample of the blood of volume 1 cm3 taken after 5 hours shows an activity of 296 disintegrations per mimute. Deterimine the total volume of blood in the body of the person. Assume that the radioactive solution mixes uniformly in the blood of the person. (1 Curie - 3.7 x 1010 disintegrations per second)...
A Geiger counter reading of a radioactive sample is initially 7020 counts per minute. The same...
A Geiger counter reading of a radioactive sample is initially 7020 counts per minute. The same sample gives a reading of 402 counts per minute 10.6 h later. What is the sample's half-life?
Radioactive Decay - Half-life and Activity 1 Radioactive decay - Half-life Time 0 1000 21 31...
Radioactive Decay - Half-life and Activity 1 Radioactive decay - Half-life Time 0 1000 21 31 750 N 1.000.000 500,000 250,000 125,000 62,500 31.250 15.625 7813 3.506 1.953 977 51 6 500 7 BI . 101 250 125 0 tie 21.234.41516171819, 1012 Time in multiples of A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour - 60 minutes, 1 minute = 60 seconds (a) Find its decay constant in year...
could you do and explain part a
er counts the number of decays from a radioactive sample ina e interval Δt from a radioactive source, starting at time t 0, The limiting n for this kind of experiment is the exponential distribution (5.69) wthere T is a positive constant. (a) Sketch this function. The distribution is zero for ent begins only at 0.) (b) Prove that this function satisfies the normalization condition (5.13). () Find the mean time T at...
I only need help with part c). Thanks!
As a radioactive specimen decays, its activity decreases exponentially as the number of radioactive atoms diminishes. Some radioactive species have mean lives in the millions (or even billions) of years, so their exponential decay is not readily apparent. On the other hand, many species have mean lives of minutes or hours, for their exponential decay is easily observed. According to the exponential decay law, the number of radioactive atoms that remain after...
If a radioactive isotope has half-life h, then the number of atoms in a sample is given by a(t)=a-2-/h where ao gives the number of atoms in the sample at time 0. The radio active decay of carbon-14 leads to clever way of determining the age of fossils and remnants of plants and animals. When an organism dies, the radioactive carbon- 14 in it decays, with half of it gone in 5,730 years. a. Suppose a mummified cat has a...
11. A small quantity of solution containing 24Na radionuclide (half life 15 hours) of activity 1.0 microcurie is injected into the blood of a person. A sample of the blood of volume 1 cm3 taken after 5 hours shows an activity of 296 disintegrations per mimute. Deterimine the total volume of blood in the body of the person. Assume that the radioactive solution mixes uniformly in the blood of the person. (1 Curie - 3.7 x 1010 disintegrations per second)...
Radioactive Decay - Half-life and Activity 1 Radioactive decay - Half-life Time 0 1000 21 31 750 N 1.000.000 500,000 250,000 125,000 62,500 31.250 15.625 7813 3.506 1.953 977 51 6 500 7 BI . 101 250 125 0 tie 21.234.41516171819, 1012 Time in multiples of A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour - 60 minutes, 1 minute = 60 seconds (a) Find its decay constant in year...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago