
Why is 1 u = 1.6605 x 10^-27 kg? - Physics Forums
Jul 23, 2012 · Sorry if this is a dumb question.. maybe I'm largely overlooking something.. For example, 1 mol of N2 (diatomic nitrogen gas) is apparently equal to 2 x (14u) x 1.6605 x 10^-27 kg/u = 4.6494 x 10^-26 kg Why is 1 mol of N2 not equal to …
Mass Spectrometer and Electric Field Problem - Physics Forums
Oct 5, 2005 · Suppose the electic field between the two electric plates in the mass spectrometer is 2.48 x 10^4 V/m and the magnetic fields B=B'=0.68 T. The source contains carbon isotopes of mass number 12,13,14 from a long dead piece of tree(To estimate atomic masses multiply by 1.67 x 10^.27 kg).
Electrical Potential Energy Converted to Kinetic Energy - Physics …
Feb 2, 2010 · The potential difference between two parallel conducting plates in vacuum is 330 V. An alpha particle with mass of 6.50 x10-27 kg and charge of 3.20 x10-19 C is released from rest near the positive plate. What is the kinetic energy of the alpha particle when it reaches the other plate? The distance between the plates is 34.0 cm. Homework Equations
Special relativity: find speed and kinetic energy - Physics Forums
Apr 28, 2010 · A proton (rest mass 1.67x10^-27 kg) has total energy that is 3.2 times its rest energy. What is: a) the kinetic energy of the proton (in joules) b) the magnitude of the momentum of the proton (in kg*m/s) c) the speed of the proton (in terms of the speed of light "c") Homework Equations E(0) = m(0)c^2
A 27-kg chandelier hangs from a ceiling on a vertical - Physics …
Oct 25, 2014 · Homework Statement A 27-kg chandelier hangs from a ceiling on a vertical 4.0-m-long wire. What horizontal force would be necessary to displace its position 0.15m to one side? Homework Equations [/B] F*x = m*g*hThe Attempt at a …
Where does 1u = 1.661x10^-24g come from? - Physics Forums
May 4, 2009 · The atomic mass unit (u) = 1.660538782×10 −27 kg (or 10^-24g) A proton has a mass of 1.672621637×10 −27 kg and a neutron 1.67492729×10 −27 The mass of the nucleus of an atom is slightly less than the mass of it's neutrons and protons because of the binding energy that holds the nucleus together - effectively the mass of a proton and ...
Atomic Mass Unit: Converting to kgs - Physics Forums
Apr 25, 2005 · Curious 3141's value should be right (I remember it being 1.66 x 10^-27 kg = 1 amu) If you wanted to derive it, you could remember that 1 amu is defined as 1/12 the mass of a carbon 12 atom, which, by definition of the mole, I believe, has a molar mass of 12 g/mol.
SHM Oscillation problem involving potential energy - Physics …
Apr 23, 2014 · For E < 4 * 10^-19 J it is a good approximation to the more accurate HCl potential-energy curve that was shown in Figure 10.31. Because the chlorine atom is so much more massive than the hydrogen atom, it is reasonable to assume that the hydrogen atom (m = 1.67 * 10^-27 kg) vibrates back and forth while the chlorine atom remains at rest.
Magnetic Forces and Magnetic Fields (mass spectrometer)
Feb 28, 2007 · Two isotopes of carbon, carbon-12 and carbon-13, have masses of 19.93x10^-27 kg and 21.59x10^-27 kg, respectively. These two isotopes are singly ionized (+e) and each is given a speed of 6.667x10^5 m/s. The ions then enter the bending region of a mass spectrometer where the magnetic field is 0.8500T.
Find the mass of two decayed fragments - Physics Forums
May 3, 2009 · Homework Statement An unstable particle with a mass equal to 3.34*10^-27 kg is initially at rest. The particle decays into two fragments that fly off with velocities of 0.987c and -0.868c. Find the masses of the fragments. Homework Equations conservation of momentum...