Physics question and answers for October 15, 2023
- Q Define the term Fusion O The release of a gamma ray O When a neutron decays into a proton and release a beta particle O A nuclear reaction where a...
- Q Define the term Fission When a neutron decays into a proton and release a beta particle O A nuclear reaction where two or more small atoms combine to make a...
- Q 5 Name several things that people ordinarily regard as real br that according to atomic materialism are not real
- Q Complete the fission reaction below by choosing the right isotope to go in the blank Ba 3 n 37 Rb 52 Kr 36 92 Rb
- Q 2 Calculate the energy released in the decay of C to B The mass of 1C is 11 011433 u The mass of B is 11 009305 u
- Q 3 226Ra becomes an isotope of Rn in one reaction What is the number of nucleons in this Rn isotope and what particle is emitted
- Q 21 How many different 3s states does the hydrogen atom have 02 O 10
- Q 5 A 137Ce atom emits very higher energy photons in one reaction What is this type of decay reaction and what atom is left over give element name and nucleon
- Q Calculate the nuclear diameter of Express your answer to two significant figures and include the appropriate units 238 U H
- Q How many protons and how many neutrons are in 224 4Ra Enter your answers numerically separated by a comma AEO O
- Q Solar luminosities 104 10 10 10 10 10 103 104 105 10 20 000 Spica hs O a Sirius B b the Sun c Betelgeuse Mizar Sirius Regulus Algol lega...
- Q 3 When Einstein wrote his paper revealing his supposition that mass and energy were simply different forms of the same thing it was a hypothesis JUST A POSSIBLE EXPLANATION based...
- Q 2 In your opinion would Einstein have developed his Big Idea without the work of Faraday Lavoisier du Chatelet or Maxwell Explain
- Q 4 What modern developments stem from Einstein s E mc equation Explain
- Q 5 15 pts In a nuclear reactor neutror Here is just one way that Uranium c n 235U 148La Br a Fill in the and write down the full element...
- Q What is common in all nuclear reactions?They always share or transfer electrons.They always release energy.They always require energy.They always form a new element
- Q In Einstein's famous mass-energy equivalenceequation, what does c represent?speed of lightmass deficitthe photonnuclear charge
- Q What is the missing product from the fusion ofhydrogen?11H+11H?________+01eSelect one:1H22H32He31H
- Q What is lost from the nucleus of an atom when it emits an alpha particle?Select one:O two protons and two neutronsO two neutrons onlyO two protons and two electronsO two...
- Q 3. For each example below, predict if the bonding will be ionic or covalent. i. Ca with Cl ii. C with H iii. Carbon monoxide iv. KBr v. SO? vi....
- Q There are 2 naturally occurring isotopes of Lithium: Li (6.015 amu) and 'Li (7.016 amu). What are the abundances of each isotope?
- Q What is the rest energy of a hydrogen atom whose atomic mass is 2.014101778? (mproton=1.0078251, mneutron = 1.0086649, c2=931.5 eV/u)940 eV1879 eV1876 eV939 eV
- Q 5.) Compare the three levels of energy of the alpha particle for gold. Give your best explanation why there were different interactions between the alpha particle and the nucleus.
- Q 6.) Did the paths for the Calcium atom with max, halfway and min alpha particles exhibit the same changes as the gold atom?
- Q 4. Which of the following can be used to describe the process of nuclear fission? Check all that apply.a chain reaction occurs to sustain the reactionit results in smaller still...
- Q Which of the following can be used to describe the process of nuclear fusion? Check all that apply.it takes place at relatively cool temperaturesit results in larger nuclei than the...
- Q Which of the following atomic equations are accurate? (select all that apply)A=X+NN=Z-AA = Z+NZ = A + X
- Q 15. Which scientist was awarded the Nobel Prize for his work with quantized energy?HeisenbergBohrPlanckOppenheimer
- Q Calculate the nuclear diameter of 238 U.Express your answer to two significant figures and include the appropriate units.
- Q If an electron in hydrogen atom jumps from3 to an orbit of level an orbit of level nn = 2, emitted radiation has afrequency______(R=Rydberg's constant, C-velocity of light).(A)3RC/27(B)RC/25(C)8RC/9(D)5RC
- Q The value of Planck's constant is 6.63 10-34 Js .The speed of light 3 x 1017 nm s-1 the wavelength in nanometer of a quantum of light with frequency of...
- Q Choose the wrong statement:A Alpha particles can be scattered by Gold nucleusB X-ray can be diffracted by crystalsC UV radiation can cause Photoelectric effectD Electrons cannot be diffracted by crystals
- Q The half life of a radioactive isotope 'X' is 20 years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to be...
- Q A certain mass of Hydrogen is changed toHelium by the process of fusion. The massdefect in fusion reaction is 0.02866 u . Theenergy liberated per u is (given1 u =...
- Q The piece of wood from a recently cut tree shows 20 decays per minute. A wooden piece of same size placed in a museum (obtained from a tree cut many...
- Q The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0MeV, respectively. When two deuterium nuclei fuse to form a helium nucleus the energy released in...
- Q A hydrogen atom in its ground state is excited by means of monochromatic radiation of wavelength 973. The number of different possible wavelengths emitted is N and longest wavelength among...
- Q The half life of a radioactive nucleus is 50 days. The time interval (t2-t?) between the time t2 when of it has decayed and the time ti when
- Q A photon of energy 10.2 eV collides with a stationary hydrogen atom in ground state inelastically. After a time interval of the order of 10- sec another photon collides with...
- Q In one of the classic nuclear physics experiments at the beginning of the 20th century, an alpha particle was accelerated toward a gold nucleus, and its path was substantially deflected...
- Q In a radioactive decay of a nucleus, a * particle is emitted followed by a y photon ofwavelength 8.30 10-13 m.(a) (i) State the rest mass, in kg, of the...
- Q A certain radioactive material has a half-life of 1 day. If you start with 1024 g of the pure substance, how many grams would remain of the original isotope after...
- Q How many molecules of dioxane are present in 2.00 x 10^-9 mol of dioxane?8.02 x 10^32 molecules of dloxane3.32 x 10^15 molecules of dioxane1.20 x 10^15 molecules of dioxane3.01 x...
- Q Isotopes of hydrogen react, forming the element helium, as shown.This reaction is best classified as which? Select one:nuclear half-lifenuclear fissionnuclear fusionnuclear decay
- Q 15. The equation E = mc2 is one of the lasting symbols of science and nuclear chemistry in general.i. Explain what each term in this equation means and what energy...
- Q The Isotope chlorine-36 decays into argon-36, with a half-life of 3.01 x 105 years. Based on this information, fill in the blanks.A particular sample contains 3 x 102 atoms of...
- Q 9 If E and P are the energy and the momentum of a photon respectively then on reducing the wavelength of photon 1 P and E both will decrease 2...
- Q The threshold frequency for photoelectric emission in Cu is 1 1 10 5 s Find the maximum energy of photoelectrons when light of frequency 1 5 10 5 s falls...
- Q Which of the following equations is relativistically invariant a B Y and 8 are constants of suitable dimensions 2 x 1 t 2 x 1 x x 1 ap x...
- Q A pion rest mass m 135 MeV c is moving with a velocity v 0 8c2 If it decays by emitting two photons both of which move in z direction...
- Q 16 Photoelectric effect experiments are performed using three different metal plates p q and r having work function Op 2 0 eV q 2 5 eV and o 3 0...
- Q V When radiation of the wavelength is incident on a metallic surface the stopping potential is 4 8 volt If the same surface is illuminated with radiation of double the...
- Q experiment graph of stopping 1 is drawn Nature 21 In photoelectric potential versus Wavelength and reciprocal of slope of graph will be hc 1 Straight line e 2 Rectangular hyperbola...
- Q A photon of wavelength is scattered from an electron which was at rest The wavelength shift A is three times of and the angle of scattering is 60 The angle...
- Q Identify the wrong statement 1 The electrical potential energy of a system of two protons shall increase if the separation between the two is decreased 2 The electrical potential energy...
- Q JJ SCIENCE ACADEMY A photon of green light of wavelength 5500 is incident on a photo emitter of work function 1 2 eV The minimum de broglie wavelength of the...
- Q If K and K are maximum kinetic energies of photoelectrons emitted when lights of wavelength and 2 respectively incident on a metallic surface If 3 2 then A B C...
- Q BPH2101 PHYSICS REMAINING TIME HOURS MINUTES SECONDS 1 48 49 31 The output of a laser has pulse duration of 30 ms and average output power of 1 W per...
- Q de Broglie wavelength of an electron accelerated by a voltage of 50 V is close to el 1 6x10 C m 9 1x10 kg h 6 6x10 4 Js 00...
- Q In Moseley s law for characteristic X rays is vv a Z b skipped B C D both a and b are independent of the material only a depends on...
- Q During charging a capacitor variations of potential V of the capacitor with time t is shown as skipped Jury 6 7
- Q When light of wavelength 800A illuminates a metal the most energetic photoelectron emitted can just ionise the hydrogen atom in ground state What is the work function of the metal...
- Q AIPMT 2008 The work function of a surface of a photosensitive material is 6 2 eV The wavelength of the incident radiation for which the stopping potential is 5V lies...
- Q MT 2006 A photo cell employs photoelectric effect to convert 1 Change in the frequency of light into a change in electric voltage 2 Change in the intensity of illumination...
- Q e in a change MP0064 When photons of energy hv fall on an aluminium plate of work function Eo photoelectrons on maximum kinetic energy K are ejected If the frequency...
- Q 4 5 Quantum efficiency n number of electrons emitted per second Quantum efficiency total number of photons incident per second nph X n nph If quantum efficiency is x then...
- Q 05 Monochromatic light of wavelength 400 nm and 560 nm are incident simultaneously and normally on double slits apparatus whose slits separation is 0 1 mm and screen distance is...
- Q If the concentration of free electrons in a metal object equals 1 102 electrons m Determine the temperature at which two percent probability that an energy level of 7 73eV...
- Q The peak emission from a black body at a certain temperature occurs at a wavelength of 6000A On increasing its temperature the total radiation emitted is increased to 16 times...
- Q 3 100 kg 4 100 gm Wavelength of n neutron at temperature 27 C is 6 A Its wavelength at 927 C will be 1 A 2 2X 3 4...
- Q When a metallic surface of threshold wavelength 4X is illuminated with light of wavelength X the stopping potential is V When the same surface is illuminated by the light of...
- Q we have a ne 44 25 5 Example 2 Electrons of energy 10 eV are incident on a potential step of height 13 8 eV Find the distance in which...
- Q iii What is the need to achieve population inversion a To excite most of the atoms b To bring most of the atoms to ground state c To achieve stable...
- Q A clean surface of a metal in a vacuum tube is irradiated with a monochromatic light of wavelength 500nm and the resulting photoelectric current is measured by the ammeter A...
- Q If work function of a metal is 3 eV and wavelength of subjected radiation to the metal is 275 nm Then the de Broglie s wavelength in A of photoelectrons...
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