Find the force of gravity between two uniform spheres as they touch each other. Each sphere has a mass of m = 15 kg and a radius of r= 0.5 m. What is the force of gravity between them when they stand (surface to surface) 2 m from each other?

Q: About 2% of the energy generated in the Sun’s core by the p-p reaction is carried out of the Sun by…

A: The overall p-p reaction can be given as follows

Q: Choose the BEST answer to the following. The equation that most underlies energy release in nuclear…

A: The equation in option (a) gives the energy of a photon.

Q: Calculate the mass (in kg) of ¹4C that has an activity of 1 Bq.

A: Givenactivity=1 Bqaslo half life of C-14=5730 yr

Q: The half-life of krypton-91 ("Kr) is 10 s. At time t = 0 a heavy canister contains 3 g of this…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: 5. Co-60 has a half life of 5.3 years. If a pellet that has been in storage for 26.5 years contains…

A: When the radioactive atoms get decay they decay at the same rate. The pattern of half-life is the…

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: Calculate whether 14462Sm and 14762Sm may alpha decay. The natural abundance of 144Sm is 3.1% and…

A: Given: The given elements are S62144m and S62147m. Introduction: Alpha decay is a type of…

Q: If the half-life of Uranium 235 is 700 million years, what would its third-life be?

A: Given data: The half life of Uranium 235 is t1/2=700 million years.   The expression for the…

Q: Considering your answer to the above question, how does this timescale for the Sun's evaporation by…

A:

Q: The 2-H formed in the first reaction has less mass than the two 1-H that form it; the missing mass…

A: Two hydrogen atoms combine via a fusion reaction to form a single deuterium atom, the reaction…

Q: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C14C has decayed to…

A: Half life of a radioactive decay is defined as the time required for the decay rate in the…

Q: Describe the basic way that each device detects radioactivity: (a) thermoluminescent dosimeter; (b)…

A: Given: Describe the basic way that each device detects radioactivity: (a) thermo-luminescent…

Q: Imagine you have a cylindrical geiger counter with a diameter of 1 in positioned 2 in away from a…

A:

Q: 15 Isotope of oxygen, g0, is susceptible to beta-decay. Which particles/radiation are released in…

A: We need to find the beta decay products for 15 8 O.

Q: Compare the energy produced per kg of fuel for the combustion of coal, d-d fusion and d-t fusion

A: Energy released in 1 kg of coal is about 30 MJ For d-d : 7.9×107 MJ/kg For d-T : 3.4×108 MJ/kg

Q: solar radiation power 3.95 * 10 ^ 33 erg.cm ^ (- 2) T ^ (- 4) effective temperature 5700 K, apparent…

A: The solar radiation power is, P=3.95×1033 erg/s  =3.95×1033×10-7 J/sP=3.95×1026 J/s This power…

Q: Calculate the binding energy per for epsilon Ni which has the highest value of any isotope. The…

A: No. of protons in Ni(62) = 28No. of neutrons = 62 - 28 = 34 Mass of 28 protons and 34 neutrons=

Q: If 14 g of radon ga present gab with a halP -life of 4 days is in a ballon at t=0,what is the mass…

A: Most of the nuclides present in nature are unstable. Hence they decay to nearby stable nuclei by…

Q: 40K decays to 40Ar with a half-life of 1.3 billion years.  Argon is a gas, so 40Ar escapes into the…

A:

Q: 40K decays to 40Ar with a half-life of 1.3 billion years.  Argon is a gas, so 40Ar escapes into the…

A:

Q: Why is it important to measure neutrinos and positrons coming from the sun?

A: Neutrinos are subatomic particles that are created in nuclear reactions, such as those that occur in…

Q: Ihalf of the human population within 30 days of exposure each this dose. Assume that at the surface…

A: lethal dosage = 425 rem dosage in rem=number of rad × RBE (RBE of photons=10) we convert the doage…

Q: Compare the energy produced per kg of fuel for the combustion of coal, d-d fusion and d-t…

A: For coal combustion C+O2 → CO2+33.94KJ/g  So Energy release per kg will be,…

Q: As recently as the late 1970s, some wrist watches were manufactured using tritium (3H) as a…

A:

Q: Neutrino oscillations can occur only if neutrinos have a mass. Why?

A: Explanation: Neutrinos can pass from one lepton family to another in a process known as neutrino…

Q: a) Identify the unknown daughter nucleus (?) in the following reaction: 235U+→ 131+ (?) + 3 (n) 53…

A:

Q: With the help of a mass spectrometer,% abundance ratios and Atomic mass (u) values ​​of various…

A: Given:

Q: How is nuclear fusion different from the process of standard radio-active decay?

A: Radioactive decay: When the unstable heavy nucleus loses energy and form a stable nucleus. This…

Q: Annealing is a high temperature process that must be performed after the wafer has undergone the ion…

A: Concept: Annealing is a treatment of a metal or alloy that involves heating to a predetermined…

Q: Outline the main steps in PET imaging.

A:

Q: cadmium -107 has a half -life of 6,52 hours .if you start off with sample which sample which has an…

A:

Q: Neutrinos produced in the sun escape immediately. Why?

A: The neutrinos can be described as particles that dont have any charge as well as they can be…

Q: b- The radioactive nucleus Ra has a half-life of approximately 1.6 103 yr. Given that the Solar…

A:

Q: One of the isotopes used for PET scans is oxygen -15, a positron emitter. What new element is formed…

A: Oxygen -15 undergoes positron decay because it has too few neutron for the number of protons. The…

Q: Where did the values for (T - 20 C) come from?

A:

Q: In rock samples, the C^14 activity measured 12 mC (12 millicurie). C^14 half-life 5730 year.…

A: In radioactive decay, the substance having unstable nuclei emits radiation and loses energy. It…

Q: An ancient rock is found to contain 40Ar gas, indicating that of the 40K in the rock has decayed…

A: To solve this problem, we need to use the concept of half-life and the relationship between the…

Q: how much energy (in Joules) is released by Helium -4 during a nuclear reaction?

A: Given: Helium-4  Asked to find energy released during a nuclear reaction.

Q: Why was the Davis experiment only able to detect one-third of the neutrinos originally predicted?…

A: Required : Why was the Davis experiment only able to detect one-third of the neutrinos originally…

Q: The half life of a radioactive nucleus is 50 days. The time interval (t, – t) between the time t;…

A:

Q: A rock sample contains two radioactive elements A and B, with half lives of 8000 and 16000 years…

A:

Q: Question 3: As we discussed, each 235U atom that undergoes fission releases approximately 200 MeV of…

A: This a problem of unit conversion. The energy of the bombs are given in terms of mass of TNT. The…

Q: 10 About 2% of the energy generated in the Sun's core by the p-p reaction is carried out of the Sun…

A:

Q: Compare the energy produced per kg of fuel for the combustion of coal, d-d fusion and d-t…

A: The energy released in D-D fusion is, H12+H12 →  H23e+n01 + 5.23×10-13 J The molecular weight of…

Q: A layer of peat beneath the glacial sediments of the last ice age has a carbon-14/carbon-12 ratio…

A: Given: Ratio carbon-14carbon-12=21.2%=21.2100=0.212 Half life of carbon-14,  t12=5730 yrs Required:…

Q: calculate Ft 3. 2

A:

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.