What prevents gravity from pulling you through the ground to the center of the Earth? Choose the best answer. (a) The density of matter is too great. (b) The positive nuclei of your body’s atoms repel the positive nuclei of the atoms of the ground. (c) The density of the ground is greater than the density of your body. (d) Atoms are bound together by chemical bonds. (e) Electrons on the ground’s surface and the surface of your feet repel one another.

What prevents gravity from pulling you through the ground to the center of the Earth? Choose the best answer. (a) The density of matter is too great. (b) The positive nuclei of your body’s atoms repel the positive nuclei of the atoms of the ground. (c) The density of the ground is greater than the density of your body. (d) Atoms are bound together by chemical bonds. (e) Electrons on the ground’s surface and the surface of your feet repel one another.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter10: Nuclear Physics

Section: Chapter Questions

Problem 84CP: This problem demonstrates that the binding energy of the electron in the ground state of a hydrogen...

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This problem demonstrates that the binding energy of the electron in the ground state of a hydrogen atom is much smaller than the rest mass energies of the proton and electron. Calculate the mass equivalent in u of the 13.6-eV binding energy of an electron in a hydrogen atom, and compare this with the known mass of the hydrogen atom. Subtract the known mass of the proton from the known mass of the hydrogen atom. Take the ratio of the binding energy of the electron (13.6 eV) to the energy equivalent of the electron’s mass (0.511 MeV). Discuss how your answers confirm the stated purpose of this problem.
What is the magnitude of the repulsive electrostatic force between two protons in a nucleus? Consider the distance between the centers of the protons to be 3.5 x 10^-13 m.If these protons were released from rest, Calculate the magnitude of their initial acceleration?
The protons in a nucleus are approximately 2 ✕ 10−15 m apart. Consider the case where the protons are a distance d = 1.89 ✕ 10−15 m apart. Calculate the magnitude of the electric force (in N) between two protons at this distance. N
TRUE OR FALSE (n) Hydrogen1 has one neutron in its nucleus, hydrogen2 has two neutrons in its nucleus, and hydrogen3 has three neutrons. (o) All isotopes of an element have the same number of electrons. (p) Most elements found on Earth are mixtures of isotopes. (q) The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth. (t) The density of a nucleus is its mass number expressed in grams.
The protons in a nucleus are approximately 2 ✕ 10−15 m apart. Consider the case where the protons are a distance d = 1.85 ✕ 10−15 m apart. Calculate the magnitude of the electric force (in N) between two protons at this distance.
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)
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)?
The figure provided shows the potential energy of a proton, q = +e, and a lead nucleus, q = +82e. If a proton is fired toward a lead nucleus from very far away with kinetic energy K = 3.00×10-12 J, how much kinetic energy does it have when it is 20.0 fm from the nucleus and moving toward it, before the collision? 5.00×10-12 J 4.00×10-12 J 3.00×10-12 J 2.00×10-12 J
Which of the following statements are true about the strong nuclear force? (i) Its range is less than 10-15 m. (ii) It is an attractive force. (iii) It is stronger than the Coulomb force at large distance. (iv) Protons in the nucleus are attracted to each other by the strong nuclear force. Select one: a. (ii), (iii), (iv) b. (i), (ii), (iii) c. (i), (iii), (iv) d. (i), (ii), (iv)
Now you have a nucleus with 16 protons at x = 5.0 Angstroms on the x-axis. How much work would it take to bring in ANOTHER nucleus with 5 protons from 1 m away and place it at y = 5.2 Angstroms on the y-axis? 87.4 eV 145.7 eV -13.8 eV 159.5 eV
The hydrogen atom's nucleus is a proton (mass 1.7 x 1027 kg), outside of which there is a single electron (mass 9.1 x 10-31 kg) at an average separation distance (d) of 5.3 x 10-11 m. To solve for elecrtric force, use Coulomb's law, where electron charge q1 and the proton charge q2 have the same magnitude (1.6 x 10-19 C).
Determine the nucleus density (in kg/m3) of the following four isotopes.4He (m = 4.00260325415 u) = 2.307e17 kg/m^321Ne (m = 20.99384668 u) = ______ (CANNOT BE 2.99328e17 kg/m^3)186Tl (m = 185.97833 u) = ________ (CANNOT BE 2.9946e13 kg/m^3)231Pa (m = 231.035884 u)= _____ (CANNOT BE 3.624e-13 kg/m^3)