Answered: The Half-life of certain radioactive…

The Half-life of certain radioactive sample is 30 minutes. At 2.00 PM, the decay rate is measured to be 1200 per second. The decay rate at 3.00 PM on that same day is:

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter30: Nuclear Physics

Section: Chapter Questions

Problem 12CQ: What fraction of a radioactive sample has decayed after two half-lives have elapsed?

See similar textbooks

Related questions

Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 5.30 x 1011 Bq when…

A: Given data: Decay rate, dNdt=5.30×1011Bq Nuclei, N = 2.50 ×1015

Q: If a 6.13 g sample of an isotope having a mass number of 124 decays at a rate of 0.350 Ci, what is…

A: The mass of the sample, m=6.13 g The mass number, A=124 u The rate of decay, dNdt=0.350…

Q: The activity of a freshly prepared radioactive sample with a half-life of 4 days is 1000 Bq. How…

A: Given : t1/2 = 4 days No = 1000 Bq N = 250 Bq

Q: The nuclide 14C contains (a) how many protons and (b) how many neutrons?

Q: A sample of radioactive material contains 1x 1014 atoms and has an activity of 6.3 x 1011 Bq. What…

Q: Using a nuclidic chart, write the symbols for (a) all stable isotopes with Z =60, (b) all…

Q: A sample of the radioactive nuclide 199Pt is prepared that has an initial activity of 7.80×1011 Bq…

A: a) We know , half life t12=t ln2ln NoNtinitial activity = 7.8x1011next activity = 9.45x1010

Q: A radioactive sample has a mass of 999 grams. How much remains after 2 half-lives?

A: If the amount of a radioactive sample is N0 initially, then after 1st half live of the sample, it…

Q: The decay constant of a radioactive source is 752 per year. Then its half- life equals: *

A: Step:1 The Time taken for a radioactive atom to disintegrate to half of its original…

Q: The half-life of Erbium-172 is 49.3 hours. What is the hourly decay rate? Express the result to four…

A: Given data The half-life of erbium 172 is given as t = 49.3 hours. Now, the hourly decay rate is…

Q: The maximum kinetic energy of the beta particle emitted during the decay of {60}^_{27}Co.

A: When beta particle is emitted during the decay of C2760o it is convert in to N2860i…

Q: Find the mass of a radioactive isotope if 3 half-lives occurred. The initial mass of the material…

Q: The decay rate of an isotope is initially R0 but after one half-life has gone by, the rate is R0/2.…

A: Required : Decay rate at the end of the next half life.

Q: A freshly prepared sample of a certain radioactive isotope has an activity of 3.7 × 1011 decays/s.…

A: Relation between activity of the radioactive isotope and half life…

Q: The nuclide 10,4 Be undergoes spontaneous radioactive decay to 10,5 B with emission of a beta…

Q: When radium 226 decays emitting an alpha particle, what is the atomic number and atomic mass of the…

A: The alpha particle having mass number 4 and atomic number 2 and it is a helium nucleus.

Q: A radioactive nucleus has half-life T1/2. A sample containing these nuclei has initial activity R0…

Q: A certain radioactive material known to decay at a rate proportional to the amount present. If…

A: Given Initial amount = 50 mg Let half life is t1/2 we know that N/No = (1/2)t/t1/2

Q: The mass of an idotope of an sulfur atom is A= 1+2Z. Please calculate the number of neutrons found…

A: Given that:- A=Mass number of sulfur=1+2Z where, Z=Atomic number of sulfur=16

Q: The binding energy per nucleon of Li-7 and He-4 nuclei are 5.60 MeV and 7.06MeV respectively. In the…

A: The binding energy per nucleon is define as the binding energy of the nucleus divide by the number…

Q: A sample of carbon of mass 6.74 g taken from an animal jawbone has an activity of 4.00 decays/min.…

A: Given that the 6.74 g of carbon taken from the jawbone. The no. of moles in 6.74 g of carbon be…

Q: What is the mass difference in a nuclear reaction if the energy released is 2.98 × 1011 J?

A: We know thatE=(∆m)c2HereE=Energy∆m=Mass differencec=Speed of light

Q: What is the half-life of a radioactive isotope if the activity of a sample drops from 14,080 cpm to…

Q: What is rate of decay after 2.5 seconds?

Q: After 2.00 days, the activity of a sample of an unknown type radioactive material has decreased to…

A: Formula to calculate the activity

Q: How many half lives must pass for the mass of a radioactive sample to decrease to 35% of the…

A: Half life of a radioactive sample is the time required for the sample to reduce to half of its…

Q: 64 g of a radioactive substance is prepared. 105 hours later, only 16 g remains. To the nearest…

A: To the nearest hour, the radioactive half-life of the substance is 52.5hours

Q: number of alpha-decays of Q in the first one hour is;

A: Given: Determine number of alpha decays of Q in the first one hour ?Where, A heavy nucleous Q of…

Q: The decay rate of an isotope is initially R0 but after one half-life has gone by, the rate is R0/2.…

A: *According to question:-Decay Rate of Isotope initially=Ro& Decay Rate after one-half…

Q: the decay of a radioactive material has a count rate is 2000 decays/min. 4 hours later, the decay…

A: Given:- the decay of a radioactive material has a count rate is 2000 decays/min. 4 hours later, the…

Q: The half-life of a radioactive isotope is 140 d. How many days would it take for the decay rate of a…

A: Given: Half life of the isotope, T = 140 days

Q: The half-life of uranium–238 is 4.5 billion years. What is the decay constant for uranium–238?

A: Calculation: The half life time of the uranium238 is 4.5 billion years.

Q: If the atomic mass of Sodium-18 is 18.02597 u, what is the binding energy?

A: Please note : As per answering guideliens I can answer the first question only. Since,,this is not a…

Q: After 1.80 days, the activity of a sample of an unknown type radioactive material has decreased to…

A: Given data: The number of days passed is t=1.8 days. The activity is decreased by x=80.4%.

Q: The half-life of a radioactive nuclide is 20 years. If a sample of this nuclide has an activity of…

A: Formula of radioactivity is as follows: I=I0e-λt…

Q: Technetium-99m is a radioactive isotope with a half-life of 6 hours. If a sample of was originally…

Q: Does the number of radioactive nuclei in a sample decrease to exactly half its original value in one…

A: The number of nuclei at a given instant of time can be given as We know,

Q: A neutral argon atom has how many neutrons?

A: Given data: Neutral argon Atomic number (Z) = 18 Mass number (A) = 39.948 ≈ 40 Required: Number of…

Q: A dose of 8.60 mCi of a radioactive isotope is injected into a patient. The isotope has a half-life…

Q: A radioactive isotope of silver has half-life of 20 minutes. What fraction of the original mass…

Q: A beta particle is emitted when carbon-14 transforms in to a nitrogen-14 nucleus. The atomic mass…

A: Atomic mass of Carbon-14 MC=14.003242 u and atomic mass of Nitrogen-14 MN=14.003074 u. The reaction…

Question

The Half-life of certain radioactive sample is
30 minutes. At 2.00 PM, the decay rate is
measured to be 1200 per second. The decay
rate at 3.00 PM on that same day is:

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

What is the dose in mSv for: (a) a 0.1 Gy xray? (b) 2.5 mGy of neutron exposure to the eye? (c) 1.5 mGy of exposure?
What time interval elapses while 90.0% of the radioactivity of a sample of 3372As disappears as measured by its activity? The half-life of 3372As is 26 h.
What fraction of a radioactive sample has decayed after two half-lives have elapsed?
In the following eight problems, write the complete decay equation for the given nuclide in the complete XZAN notation. Refer to the periodic table for values of Z. decay of 226Ra, another isotope in the decay series of 238U, FIrst recognized as a new element by the Curies. Poses special problems because its daughter is a radioactive noble gas. In the following four problems, identity the parent nuclide and write the complete decay equation in the XZAN notation. Refer to the periodic table for values of Z.