If there were originally 400 grams of carbon-14 in an object, how many grams would remain after 3,200 years?

Q: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be…

A: Given data :- N0 = 135 gT = 3.t1/2  ;  t1/2 being the half life of isotope

Q: Carbon-14 decays into Nitrogen-14 emitting β particles and has a half-life of 5,730 years. This is…

A: The Radioactive decay follows the first-order kinetics. In this, the rate of decay is proportional…

Q: A hypothetical radioactive isotope has a half life of 10 minutes. If you start with 100 grams of…

A:

Q: The half-life of Carbon-13 is 5750 years. Samples taken at an excavation site show that a…

A:

Q: The amount of certain radioactive substance is reduced from 30 grams to 23 grams in 30 days. What…

A: In radioactive decay, the relation between the amount of radioactive substance left and the initial…

Q: If you are told the half life of a material is 3,500 years, then how much would be remaining from a…

A: Given data: Half life (t1/2)= 3,500 years Initial quantity of the substance (N0) = 10 g Time elapsed…

Q: Cobalt-60 is a synthetic radioactive isotope of cobalt with a half-life of 5.3 years. What was the…

A: Given data The half-life of the cobalt is t1/2 = 5.3 years The quantity of the radioactive isotope…

Q: The half-life of carbon-14 is 5730 years. If 6.25% of the original sample remains, how old is the…

A:

Q: One of the radioactive nuclides formed in nuclear power plants is hydrogen-3, called tritium, which…

A: According to theroy of Radioactivitythe decay rate of a nuclei which has initially N0 nuclei  at any…

Q: one-eighth of a radioactive element remains after 600 years, what is that elements half-life?

A: Let initial number of nucleus = No  remaining number of nucleus = N = No /8  Time taken t = 600…

Q: A certain radioactive material has a half-life of 8 minutes. Suppose you have a large sample of this…

A:

Q: The half life of carbon-14 is 5730 years. How long will a certain amount of carbon – 14 decay by 90%…

A:

Q: The half-life of radium-226 is 1600 years. How long will it take for 10.0 mg of radium-226 to decay…

A: Using half life concept to solve the problem

Q: A particular isotope has a half-life of 1 minute. If you start with 1 gram of this isotope, how much…

A: In the given question, We have to determine the remaining quantity of the isotope after 10 minute.

Q: The half-life of plutonium-239 is 24,300 years. If a nuclear bomb released 8 kg of this isotope, how…

A: The half-life of plutonium-239 is 24,300 years. If a nuclear bomb released 8 kg of this isotope, how…

Q: A sample from human remains found near Stonehenge in England shows that 71.2% of the carbon-14 still…

A:

Q: The half life of carbon-14 is approximately 6000 years. How long will it take a sample of carbon-14…

A:

Q: The isotope carbon-14, 14/6C, is radioactive and has a half-life of 5 730 years. If you start with a…

A:

Q: A radioactive material has a half-life of eight days. How long will it take for the material to be…

A:

Q: A quantity of a radioactive element gives 1,200 alpha particles every 60 seconds, and after 120…

A:

Q: A human skeleton found at an archeological site is found to have on 1/10 the amount of Carbon-14 one…

A: Given, N= 1/10=0.1 No= 1 T= 5730years We know that, N= No(1/2)t/T

Q: If carbon-14 underwent beta decay, what is the resulting nucleus?

A: Beta decay:  A element which undergoes beta decay then the neutron of the atom gets converted to…

Q: The initial amount of carbon-14 is 100 g and the amount of carbon-14 dropped to 1 g after decay…

A: N=N0e-λtt=1λlnN0N=t1/20.693lnN0N

Q: The radioactive element 2760Co  has a half life of ______ years. If you had a sample of 17 g, about…

A: Given: The mass of sample (m) = 17 g. The half-life of cobalt (T1/2) = 5.27 years. The life of…

Q: a parent isotope has a half-life of 500,000 years. if a rock contained 10mg of the parent isotope…

A: Write the expression for the quantity left after time t. Here, No represents the original quantity,…

Q: Compute the mass of 1 m3 of nuclear matter and the mass of Earth (6x1024 kg).

A: Required :  Mass of 1 m3 of nuclear matter and mass of the Earth.

Q: 17: A sample of U-235 started with 120 grams.  If the half-life of U-235 has a half-life of…

A:

Q: if the amount of the parent isotope in the original sample of a rock had been 48 grams, about how…

A:

Q: Carbon-14 has a half-life of 5730 years. If you start with a sample of 24 Kg, how many Kg of…

A: Given data:  Half life (T1/2)= 5730 years Initial quantity (N0) = 24 kg Time (t) = 17190 years…

Q: How many atoms of carbon-14 are there in Ig of carbon-12 in living organism?

A: Since there are 6.022×1023 carbon atoms in 12 grams of carbon. The 12 gram carbon atom contains,…

Q: A radioactive isotope has a half-life of 1.2 billion years. As measured by the presence of the…

A:

Q: The half life of 85Kr is 11 years. What is the mass of one millicurie of 85Kr? O 9.2 microgram O 30…

A: Given  Half life = 11year  T½= 11*365*24*60*60 sec =3.48*10⁸ sec I millicurie = 3.7*10⁷ /s  Lambda=…

Q: Skeletal remains had lost 79% of the C-14 they originally contained.  Determine the approximate age…

A: The expression for the amount left after time t is,

Q: A sample of a radioactive element has a half-life of 180 days; what percent of this sample will…

A: The decay constant of a radioactive sample is given by :  The amount of sample left after 't' time…

Q: The half life of C-14 is 5730 years.  What percentage of C-14 remains 4850 years after a living…

A:

Q: If a sample of a radioactive isotope has a half-life of 3 years, how much of the original sample…

A: The half-life of the sample = 3 years (a) That means, after every 3year the sample becomes half of…

Q: Carbon-14 is radioactive while Carbon-12 is stable.  In your body, the ratio of C-14 to C-12 is for…

A: Half-life is the time taken for a radioactive material to reduce into half of its initial value.…

Q: A rock sample contains a radioactive isotope that has a half-life of 10,000 years. One-fourth (25%)…

A:

Q: The half-life of a certain radioactive isotope is 30 minutes. If we start out with 100 g of the…

A: Given: Half-life (T1/2) = 30 min. = 0.5 h. Mass of the isotope (m) = 100 g. Time (t) = 2.0 h.

Q: The​ half-life of​ carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree…

A:

Q: the half-life of Uranium-238 is 4.46 × 109 years. If a sample of mass 10kg is thought to have formed…

A:

Q: C^14, a form of carbon that is used to find the age of fossils has a half life of 5730 years. how…

A: Given(s): Initial sample, N0=10 g. Half-life, t12=5730 yr Time, t=13,000 yr. Require: Amount of…

Q: If we start with 6.4*10^12 atoms of a radioactive material with a half life of 1.2 days, how many…

A: Half life of radioactive material is the amount of time takes for half of a particular sample to…

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

A:

Q: Meihui is at NASA analyzing Moon rocks. In one of the rocks from the lunar highlands, he discovered…

A:

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.