Physics question and answers for October 18, 2023
- Q A radio isotope 'X' with a half life 1.4 10?years decays to 'Y' which is stable. A sample ofthe rock from a cave was found to contain 'X'and 'Y' in...
- Q A definite amount of solid NH4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.1 atm pressure. NH4HS decomposes to give NH3 and H?S...
- Q A stationary x200 nucleus emits an a-particle with kinetic energy = 196 keV, if kinetic energy of daughter nucleus in this process is Kand Qvalue of the reaction is Qo,...
- Q Choose correct option(s) using the given data of atomic masses.Energy released during a-decay of approximatelyThe emission of proton from spontaneousEnergy released during a-decay of 92238 is 4.25 MeV approximatelyThe emission...
- Q A wooden artifact from an ancient tomb contains 60 percent of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made?...
- Q Identify the radioisotope used to determine the age of fossilized remains of an insect.C-14Co-60I-131Na-24
- Q Which of the following is emitted by an ideal medical tracer used for diagnostic purposes?I. Alpha raysII. NeutronsIII. Gamma raysIV. X-raysI and IIIIII and IVIII aloneIV alone
- Q Which of the following dosages will best extend the shelf-life of strawberries?30 kGY0.3 kGy3 kGy13 kGy
- Q Emissions from alpha decay require the least amount of shielding.Which best describes why the emissions from alpha decay are so easily blocked compared to the emissions of other types of...
- Q 20mg of radioactive substance loses 8% of its mass every minute. Because the substance becomes weaker, this is a "___".problem and can be modeled by the exponential function____.( After 10...
- Q A rare decay mode has been observed in which Ra emits a ?C nucleus.a. The decay equation is Ra ? AX +?C.Identify Nuclide AX (element and number of nucleons) and...
- Q The half-life of Lead-214 is 1584 s.(A) What is the decay constant for Lead-214?(B) A 100.0 kg sample of Lead - 214 is allowed to decay for 4752s. How many...
- Q Put the following periods in correct order from Youngest to Oldest. Put the youngest at the top and place them in order to oldest at the bottom.= Triassic= Permian= Cretaceous=Jurassic=...
- Q The initial value of the exponential function f (x) is 250 and is increasing by 4%. Which of the following statements about f (x) is true? (1 point)f(x) has a...
- Q A photon with energy 0.25MeV scatters off an electron that is at rest.The scattered photon is observed at an angle of 350 with respect to the incident photon.Determine the kinetic...
- Q Naturally occurring strontium consists of four isotopes, Sr-84, Sr-86, Sr-87 and Sr-88, whose atomic masses are 83.9134, 85.9094, 86.9089 and 87.9056 amu respectively. The most abundant isotope is Sr-88 which...
- Q Physics handra 15 13 ne 15 ucture andra idy of SMART Q 6 What is beta B decay Which force function of it TS May A In B decay the...
- Q n 6 M denotes the mass of a proton and M that of a neutron A given nucleus of binding energy B contains Z protons and N neutrons The mass...
- Q X rays were produced using Cobalt Z 27 as target It was observed that the X ray spectrum contained a strong K line of wavelength 0 1785 nm and a...
- Q 1 13 Which of the following functions represents acceptable wave function of a particle in the range 0 x 0 a p x A tan x A 0 b p...
- Q The first two energies and spin particles for Er is shown in the figure Using the rotational model determine the spin parity and energy of the next two levels Also...
- Q The moment of inertia of HBr molecule is 3 30 1047 kg m Find the wave number in cm of absorption lines involving transitions between the rotational ground state and...
- Q The sun continuously produces an enormous amount of energy This is due to A chemical combustion B nuclear fusion C nuclear fission D Both A and C
- Q se which has large difference of n2 n1 and levels which ar e near to nucleus Otherwise I know the original method I just want to confir m if there...
- Q 8 In decay electron emission the particle emitted along with electron is anti neutrino On the other hand the particle emitted in decay positron emission is neutrino v Neutrino and...
- Q An energy of 24 6 eV is required to remove one of the electrons from a neutral helium atom The energy in eV required to remove both the electrons from...
- Q ativist formula the velocity comes out to be 0 999 c 21 a A monoenergetic electron beam with electron speed of 5 20 x 106 m s is subject to...
- Q ii According to shell model of the nucleus a b c d magic number exist nucleons interact with their nearest neighbour only nucleons in a nucleus interact with general force...
- Q The activity of a freshly prepared radioactive sample is 1010 disintegration per second whose mean life is 109 s The mass of an atom of this radioisotope is 10 25...
- Q 1 10 A Carnot engine having an efficiency of n heat engine is used as a refrigerator If the work done on the system is 10 J the amount of...
- Q A Prove that t t In 2 In No Nt determines the half life of a 30 g sample of Pu 239 which is 24 126 years if it will...
- Q earlier but could not understand the response Please do explain both the options and the concept used to solve th s question Thank you for helping Question Consider aiming a...
- Q ents Consider the A Spectrum of energy of a particles in a decay is line spectrum B Spectrum of energy of B particles in decay is continuous spectrum Which of...
- Q 92 Assume that about 200 MeV energy is released per fission of u nuclei For 1 MW power generation the amount of 22u required per day is nearly Assume all...
- Q A nuclear power plant has a reactor that produces heat at the rate of 820 MW This heat is used to produce 250 MW of mechanical power to drive an...
- Q 2 The electron emitted in beta radiation originates from 1 Inner orbits of atoms 2 Free electrons existing in nuclei 3 Decay of a neutron in a nucleus 4 Photon...
- Q 0 For a certain metal the K absorption edge is at 0 172 A The wavelength of Ka K and K lines of K series are 0 210A 0 192A...
- Q A gas mixture consists of molecules of type 1 2 and 3 with molar masses m m m3 Vrms and are the r m s speed and average kinetic energy...
- Q hrough the o a uniform e capacitor e magnetic difference 4 30 A proton a deutron and an a particle have equal kinetic energies Compare the radii of their paths...
- Q A radioactive substance is dissolved in a liquid and the solution is heated The activity of the solution A is smaller than that of element B is greater than that...
- Q In a fission reaction 92 the binding energy per nucleon of X and Y is 8 5MeV whereas of 236U is 7 6 MeV The total energy liberated will be...
- Q IfR is the value of the Rydberg constant assuming mass of the nucleus to be infinitely large compared to that of an electron and if R is the Rydberg constant...
- Q 3 The mother and daughter elements with the emission of rays are called Bu da ga 2 Isobars 2 1 Isotopes 1 3 Isomers 3 4 Isodiophers 4 SE
- Q In a nuclear fusion reaction two nuclei A and B fuse to produce a nucleus C releasing an amount of energy AE in the process If mass defects of A...
- Q Radioactive iodine 131 t1 2 8 0 days decays to form xenon 131 by emission of a particle How much of each isotope is present after each time interval if...
- Q Example 18 Find the half life of uranium given that 3 23 x 10 7g of radium is found per g of uranium in old minerals The atomic weights of...
- Q Example 2 A laser beam has a power of 100 mW and an aperture of 4 x 10 3 m It emits light of wavelength 6000 A The beam is...
- Q In a radioactive substance at t 0 the number of atoms are 16 x 104 Its half life period is 4 years The number of atoms will remain 1 104...
- Q Binding energy per nucleon versus mass number 2 curve for nuclei is shown in the figure W X Y and Z are four nuclei indicated on the curve The process...
- Q lighter nuclei Let 8 MN Mp Mo where Mp Mo and My are the masses of P Q and N respectively Ep and EQ are the kinetic energies of P...
- Q Example 21 An excited atom of mass mo is at rest in a certain frame of reference It emits a photon and thereby lose an internal energy AE Taking care...
- Q An a particle and a free electron both initially at rest combine to form a Het ion in its ground state with the emission of a single photon the energy...
- Q 10 The type of equation shown below is an example of a an Cu 2HCI H CuCl direct union decomposition single replacement exchange of ions 3 points 11 The type...
- Q nebula neutron star supernova an explosion of a star the dense remains of a star a large mass of gas anc dust
- Q If the half life of a first order reaction is 15 min then how much fraction of the reactant remain unreacted after 45 min 4 100 1 16 hr min...
- Q Match the following Column I A B C D A B C Splitting of a heavy atom Combining of two atoms Controlled chain reactions Uncontrolled chain reactions A S BR...
- Q How do we know that Ea and Eb are binding energies PER NUCLEON 18 The binding energies of the nuclei A and B are E and Erespectively Three atoms of...
- Q force is much weaker than even Coulomb force The nuclear force between two nucleons falls rapidly to zero as their distance is more than a few femtometres This leads to...
- Q If T is the half life of a radioactive material then the fraction of initial nuclei that would remain after a time T 2 is Only one correct answer A...
- Q e binding energies of nuclei X and Y are E and E respectively Two oms of X fuse to give one atom of Y and an energy Q is released...
- Q Binding energy per nucleon of a fixed nucleus XA is 8 MeV It absorbs a neutron moving with kinetic energy K E 4 MeV and converts into Y Emitting a...
- Q The diagram shows the energy levels for an electron in a certain atom Which transition shown represents the emission of photon with the maximum energy n 4 11 n 3...
- Q In a hydrogen atom following Bohr s postulates the product of linear momentum and angular momentum is proportional to n where n is the orbit number Then x is H...
- Q An electron and proton are separated by a large distance and the electron approaches the proton with an initial kinetic energy of 2 9eV The electron is captured by the...
- Q Consider the following reaction H H He Q If m H 2 0141u and m He 4 0024 u the energy Q released in MeV in this fusion reaction is...
- Q 231U decays to 2 Pa The proposed mode is decay or K shell capture The masses are 92 91 Pa M 231 03621 amu Mpa 231 03588 amu mass of...
- Q Average binding energy per nucleon is constant and is equa to 8 MeV per nucleon for most of the nuclei This is because nuclear force Is long range force Is...
- Q Let Fpp FPn and Fnn denote the magnitudes of the net force by a proton on a proton by a proton on neutron and by a neutron on a neutron...
- Q 2 1 The natural boron of atomic mass 10 81 u is found to have two isotopes 08 and B The ratio of abundance of isotopes of natural boron should...
- Q 17 A nucleus with mass number 220 initially at rest emits an a particle If the Q value of reaction is 5 5 MeV the kinetic energy of a particle...
- Q measured by electron scattering is 3 6 fm What is the mass number of the nucleus most likely to be NCERT Pg 441 1 27 3 56 2 40 4...
- Q ALLEN 117 35 In a fission reaction 336 U 7 X 7 Y n 92 the binding energy per nucleon of X and 8 5 MeV whereas of 236U is...
- Q If the size of atom which is of order of 10 10 m is scaled up to the tip of sharp pin then rough estimate of size of nucleus is...
- Q vx105 ms 2 55 4 35 5 20 Out of electron proton which one will have a higher velocity to produce matter waves the same wavelength Explain it What is...
- Q 3 The ionization energy of the electron in the hydrogen atom in its ground state is 13 6 eV The atoms are excited to higher energy levels to emit radiations...
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