Physics question and answers for October 19, 2023
- Q barium isotope 131 Ba has a half life of 12 s A 270 g sample of 131 Ba is prepared Part B Part C What is the mass of 131...
- Q Measurements of a certain isotope tell you that the decay rate decreases from 8271 decays minute to 3138 decays minute over a period of 4 00 days Part A What...
- Q An astronomer is trying to estimate the surface temperature of a star with a radius of 5 0 x 108 m by modeling it as an ideal blackbody The astronomer...
- Q The half life of sodium 24 is 15 hours Starting with a sample of 50 grams how many grams of sodium 24 will remain after 45 hours 0 6 7...
- Q Population of a certain insect grows according to the law of uninhibited growth This means that the growth is modeled by the function A t Agekt where A is the...
- Q Use the data table below to answer the next 4 questions note the table will be reproduced for each question Star 1 Star 2 Star 3 Star 4 O a...
- Q The rest energy of an object is equal to what?one-half its mass times the speed of lightits mass times the speed of light squaredO its mass times acceleration due to...
- Q Deep in the core of the Sun, 620 million metrictons of hydrogen nuclei are converted into 616million metric tons of helium nuclei everysecond. What happens to the "missing mass" inthe...
- Q What number completes the missing part of thisnuclear equation?:24 Na ? 20F + 42?11 __Enter answer below
- Q Nuclear reactions that occur in the Sun release atremendous amount of energy. Which statementbest describes the force that is responsible forthe release of this energy?A. It is long ranged and...
- Q The combination of two atomic nuclei into one,accompanied by a release of energy, is called:A. fusionB. chain reactionC. fissionD. radioactive decay
- Q The Strong Nuclear Force is responsible for...A. Keeping the electrons in orbit around the nucleusB. Keeping the protons away from each otherC. Bonding the nuclei of two atoms to each...
- Q Uranium-235 decays into thorium-231 by emitting an alpha particle. This process releases energy. Where does the energy come from?Select one:O The total mass of thorium-231 and an alpha particle is...
- Q In a hydrogen fusion reaction, two lighter hydrogen nuclei merge to form a heavier, more stable helium nucleus. The energy that is released in a hydrogen fusion reaction isSelect one:O...
- Q Which of the following can be used to describe nuclear fission? Check all that apply.energy is released as lightused in nuclear reactorsused in atomic bombsnot very efficient
- Q Which of the following would be considered the cons of using nuclear fission? Check all that apply.the waste products include radioactive elementsproduces air pollution from smoke stacksthere is a chance...
- Q What are control rods in a nuclear reactor?they control the intensity of the chain reactionthey are used for emergency notificationthey serve to fuel the nuclear reactionthey absorb energy from the...
- Q What is the rest energy of a neutron? (c = 2.9979 x 109 m/s, mn= 1.6749 x 10-27)8.18 x 10-14 J1.5053 x 10-10 J2.73 x 10-22 J1.5032 x 10-10 J
- Q Which of the following are considered the pros to using nuclear fusion? Check all that apply.it happens at "normal" temperaturesit generates an abundant amount of energyit is generally about 80%...
- Q The half-life of Barium-139 is 4.96 x 103 seconds. A sample contains 3.21 x 107 nuclei. What is the decay constant for this decay?2.22 x 10-4 s-11.40 x 10-4 s-11.67...
- Q Which of the following are true regarding beta plus decay? (Select all that apply)emits an antineutrinoemits a neutrinothe nucleus emits a high-energy electronthe nucleus emits a high-energy positron
- Q The half-life of Silver-105 is 3.57 x 106 seconds. A sample contains 5.78 x 1017 nuclei. What is the decay constant for this decay?1.54 x 10-7 s-11.94 x 10-7 s-11.37...
- Q The half-life of Argon is 6.5 x 10^3 seconds. A sample contains 4.2 x 107 nuclei. What is the decay constant for this decay?1.07 x 10-4 s-12.25 x 10-4 s-11.55...
- Q A sample of 1.5x1010 atoms that decay by alpha.emission has a half-life of 70 min.How many alpha particles are emitted between t = 50 min and t = 200 min?Express...
- Q Two radioactive substances A and B have decay constants 5X and X respectively. At t = 0 they have the same number of nuclei. The ratio of number of nuclei...
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