OR TEACHER In one of the classic nuclear physics experiments at the beginning of the 20th century, an alpha particle was accelerated toward a gold nucleus, and its path was substantially deflected by the Coulomb interaction. If the energy of the doubly charged alpha nucleus was 2.87 MeV, how close (in m) to the gold nucleus (79 protons) could it come before being deflected?
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- (a) What is the final speed (in m/s) of an electron accelerated from rest through a voltage of 87.5 MV by a negatively charged Van de Graaff terminal? (Ignore relativistic effects.) (b) What is unreasonable about this result? (c) Which assumptions are responsible?electron in a well. digure 24-65 shows eletric potential V along an x axis. the scale of the vertical axis is set by Vs=8.0V. An eletron is to be released at x=4.5 cm with intial kinetic energy 3.00eV. (a) if it is initially moving in the negative direction of the axis, does it reach a turning point (if so. what is the x coordinate of that point) or does it escape from the plotted region (if so, what is it its speed at x=0)? (b) if it is initially moving in the posiitve direction of the axis, does it reach a turning point (if so, what is the x coordinate of that point) or does it escape from the plotted region (if so, what is its speed at x=7.0 cm)? what are the (C) magnitude F and (d) direction (positive or negative direction of the x axis) of the electric force on the electron if the electron moves just to the left of x=4.0 cm? What are (e)F and (f) the direction if it moves just to the right of x=5.0cm?Use the exact values you enter in previous answer(s) to make later calculation(s). The electrons in a CRT are accelerated through a potential difference of 32 kV. (a) Do the electrons move from a region of high potential to a region of low potential, or vice versa? O from high potential to low potential O from low potential to high potential (b) What is the change in kinetic energy of one of the electrons? (c) If the initial speed is very small, what is the final speed of an electron? m/s
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