Problem on kinetic energy of an electron
The kinetic energy of an electron is around 29.3 eV. (i) Determine how fast it is moving, represented as a fraction of the speed of light c? (ii) Determine its wavelength?
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A neutral K meson (having mass 498 MeV/c2), or kaon, decays at rest into two pi mesons or pions (having mass 140 MeV/c2 each) (i) The two pions should fly out in precisely opposite directions. Explain why? (ii) Determine the kinetic energy of each
(i) Determine the maximum kinetic energy of the ejected electrons. (ii) When 1.0% of the photons hitting a 1.0 cm2 area of platinum eject electrons, determine how many electrons are emitted per second from that portion of the surface?
Determine present value of the annuity of $5000/year for 5 yrs if payments are received at starting of year and can be reinvested to earn 5%?
A photon having a wavelength of 6.60e-11 m is scattered through a loosely bound electron in a metallic target and exits at an angle of 135° from the original direction. Determine the wavelength of the scattered photon?
(i) Determine the limit of the precision to which we can position the particle all along the y-axis? That is, determine the minimum uncertainty in the y-position? (ii) Does this position any limitation on the precision with which we can place its
When we substitute the proton with an electron, then what is the change in kinetic energy?
Consider AOB be the quadrant of the circle. On AB as the diameter, draw the semicircle lying outside of quadrant. Illustrate that line bounded by quadrant and semicircle has same as triangle AOB.
An electron and a proton are at a distance r = 8.3 x 10-9 m apart. Determine how much energy is needed to raise their separation through a factor of six?
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