During each microsecond, the current in an electric circuit decreases by 9.3%. If the initial current is 2.45 mA, how long does it take to reach 0.50 mA?

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A: Given,The half-life of Radium-226 is 1590 years. i.e., h=1590A sample contains 200 mg.…

Q: Find the age of a fossil that has 1/4 of its carbon 14 remaining. (k= -0.00012). Round to the…

A: A=Pekt a fossil that has 1/4 of its carbon 14 remaining so take A=P4 and here k=-0.00012

Q: A certain forest covers an area of 2500 km". Suppose that each year this area decreases by 5.75%.…

A: Explanation of the solution is given below...

Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

A: for the half-life, use the formula y=a0.5tp here initial amount is a=300 mg and the half-life is…

Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

A: Given: The half - life of Radium - 226 is 1590 years.  A sample contains 300 mg.  To find: Amount of…

Q: You have 128 grams of a radioactive kind of strontium. If its half-life is 51 days, how much will be…

A: ln e= 1 ln ab=b ln a

Q: The half-life of Radium-226 is 1590 years. If a sample contains 500mg, how many mg will remain after…

A:

Q: The half-life of radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A: The formula to find the amount of remaining radioactive material is given by the expression: An =…

Q: The radioactive element Carbon-14 has a half-life of approximately 5730 years. A fossil is measure…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

A:

Q: One earthquake has magnitude 3.9 on the MMS. If a second earthquake has 600 times as much energy as…

A: The expression to calculate the magnitude of the earthquake is, M=23 log10EE0⋯⋯⋯1 Given, the first…

Q: The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain…

A:

Q: The half-life of radium is 1690 years. If 30 grams are present now, how much will be present in 140…

A:

Q: The half-life of radium is 1690 years. If 80 grams are present now, how much will be present in 710…

A: Formula for decay A(t)= Aoekt Given Ao=80

Q: The half-life of radium is 1690 years. If 30 grams are present now, how much will be present in 570…

A: We have to finds the remaining amount

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A: Given that - Half Life = t12 = 1590 years.Formula for half life - t12 = ln2kk = ln2t12where,k = rate…

Q: The radioactive element Carbon-14 has a half-life of approximately 5730 years. A fossil is a measure…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A:

Q: A wooden artifact from an ancient tomb contains 25 percent of the carbon- 14 that is present in…

A:

Q: A wooden artifact from an ancient tomb contains 30 percent of the carbon-14 that is present in…

A: Given, Initial quantity of carbon-14=N(0)= 100% Quantity of C-14 remaining=N(t)= 30% Half-life of…

Q: A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in…

A: We have to find how long ago, to the nearest year, was the artifact made.

Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

A: We know the half life formula:Nt=N012tt1/2Where Nt=Amount after t years.          N0=Initial Amount.…

Q: The population of a country doubles in 50 yrs. How many years will it be 7 times as much?

A: The population of country becomes double in 50 years.

Q: The half-life of radium is 1690 years. If 80 grams are present now, how much will be present in 360…

A: Given query is to find the amount remaining after 360 years.

Q: There are 6,000 cases of Coronavirus in Hong Kong. If Coronavirus cases increase at a rate of 3% per…

A: according to question number of Coronavirus cases after n days is=6000(1+3100)n =6000(1.03)n

Q: A nurse gives a patient 800 mg of medicine at 10:00 a.m. If the half life of the medicine is 3…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain…

A:

Q: a radioactive isotope, selenium, used in the creation of medical images of the pancreas, has a…

A: To use the exponential model of radioactivity to determine the required amount of substance

Q: - The population of a country doubles in 82 yrs. How many years will it be five times as much?

A: We have to solve given problem:

Q: A certain forest covers an area of 3800 km". Suppose that each year this area decreases by 5.75%.…

A:

Q: If18 g of a radioactive substance are present initially and 4yr later only 9g​remain, how much of…

A:

Q: A wooden artifact from an ancient tomb contains 25 percent of the carbon-14 that is present in…

A: For the given wooden artifact which contains 25 % of C-14 half life is 5730 years  Number of years…

Q: The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain…

A: Given half life =1590 years t0=100, time =0t1=50, time =1590t2=25, time = 2(1590)t3=12.5, time =…

Q: The population of a country doubles in 81 yrs. How many years will it be five times as much?

A: Let 'P' be the number of population then dPdt = KP∫dPP =∫ KdtIn P = Kt +c ......(1)When t = 0  ; P =…

Q: The half life of radium is 1690years. If 59 grams are present now, how much will be present in 60…

A: Let A(t) be the amount remaining in t years, then

Q: Student A is 35yrs old now. 3 yrs ago, student A  was 4 times as old as Student B. how old is…

A: Given, student A is 35yrs old and 3 yrs ago, student A  was 4 times as old as student B To find the…

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 500 mg, how many mg will remain…

A: To find the remaining amount after 4000 years.

Q: The half-life of Cobalt-56 is 77.27 days. If a sample contains 460 mg, how many mg will remain after…

A: Half-lifeA=Ao. 12n whereA- The mass of the substance that remains Ao- Initial massn= ratio between…

Q: The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain…

A:

Q: A wooden artifact from an ancient tomb contains 50 percent of the carbon-14 that is present in…

A:

Q: The half-life of a radioactive material is about 34.2 years. How much of the material is left after…

A:

Q: The half-life of radium is 1690 years. If 50 grams are present now, how much will be present in 580…

A: Since it is given that half-life of radium is 1690 years.Our aim is to calculate that how much…

Q: The half-life of radium is 1690 years. If 80 grams are present now, how much will be present in 240…

A:

Q: The half-life of radioactive radium (226Ra) is 1599 years. What percent of a present amount of…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A:

Q: The half-life of radium is 1690 years. If 90 grams are present now, how much will be present in 370…

A: