Answered: Find the following: 1. Net force at q1…

Name: Find the following:1. Net force at q1 (magnitude and direction)2. Net
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Description: Find the following:1. Net force at q1 (magnitude and direction)2. Net force at q2 (magnitude and direction)3. Net force at q3 (magnitude and direction) Three particles are along the x-axis.2 cm2 cm92939,- 4, = 5 nC and q, - -5 nC.

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Find the following: 1. Net force at q1 (magnitude and direction) 2. Net force at q2 (magnitude and direction) 3. Net force at q3 (magnitude and direction)

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter31: Radioactivity And Nuclear Physics

Section: Chapter Questions

Problem 14PE: (a) Show that if you assume the average nucleus is spherical with a radius r=r0A1/3, and with a mass...

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(a) Show that if you assume the average nucleus is spherical with a radius r=r0A1/3, and with a mass at A u, then its density is independent at A. (b) Calculate that density in u/fm3 and kg/m3, and compare your results with those found in Example 31.1 for 56Fe.
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Which one of the following MCQ is correct
A proton, which is the nucleus of a hydrogen atom, can be modeled as sphere with a diameter of 2.4 fm and a massof 1.67 x 10^-27 kg. Determine the density of the proton.
A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm and a mass of 1.67 10-27 kg. Determine the density of the proton (kg/m^3)
a) When is a neutron unstable? b) If you have a bunch of lone neutrons, what fraction of them will decay in 11 minutes? Hint: see text section (39.2) on p.610 and figure 39.4.
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The binding energy of a hydrogen atom is 13.6 eV.(a) What is the decrease in mass that occurs when a hydrogen atom is formed from a proton and a neutron? Express the result in atomic mass units (u) and in mass percent of hydrogen.(b) What is the decrease in mass that occurs when a helium nucleus is formed from two protons and two neutrons? Express the result in atomic mass units (u) and in percent of the mass of the helium nucleus.(c) Compare your answers to items (a) and (b). Why do we hear that mass "loss" occurs in nuclear reactions but not in chemical reactions (Lavoisier's Law)?
A sample of carbon-14 initially consists of 5 × 10 24 particles. Carbon-14 has a half- life of 5730 years. a. What is the decay constant for carbon-14? (Answer in units of yr –1 .) b. How many radioactive particles of the sample remain after 100 years? c. What percentage of the radioactive particles remains after 500 years? d. How many radioactive particles of the sample remain after 1000 years? e. How much time will it take for 50% of the particles to decay? f. How much time will it take for 99% of the particles to decay? g. How many half-lives will it take for 99% of the sample to decay? h. What is the initial decay rate of the sample? (Answer in decays/yr.) i. After 200 years, what is the decay rate of the sample? j. How long will it take for the decay rate to decrease to 1015 decays/year? k. How many half-lives have passed after the time you found in part (j)?