Alpha particles, each having a charge of +2e and a mass of 6.64 × 10-27 kg, are accelerated in a uniform 0.80-T magnetic field to a final orbit radius of 0.30 m. The field is perpendicular to the velocity of the particles
How long does it take an alpha particle to make one complete circle in the final orbit? (e = 1.60 × 10-19 C) A) 0.15 ?s
B) 0.25 ?s
C) 0.33 ?s
D) 0.40 ?s
E) 0.49 ?s
A
You might also like to view...
What is the primary reason that we launch X-ray telescopes into space rather than building them on the ground?
A. It is less expensive to launch them into space. B. On the ground, there would be too much light pollution from nearby cities. C. Atmospheric turbulence blurs X-ray images too much. D. X-rays from space do not reach the ground.
Which type of star has the strongest stellar winds?
A) giant K- and M-type stars B) white dwarfs C) dwarf K- and M-type stars D) main sequence O- and B-type stars E) T Tauri stars
Increased air pressure on the surface of hot water tends to
A) prevent boiling. B) promote boiling. C) neither of these
Is often called the fully-implicit form of the one-dimensional transient conduction difference equation because all quantities in the equation, except for the temperatures in the energy storage term, are evaluated at the new time step, m + 1. In an alternate form called Crank-Nicholson, these quantities are evaluated at both time step m and m + 1 and then averaged. This averaging significantly improves the accuracy of the numerical solution relative to the fully-implicit form without increasing the complexity of the solution method. Derive the one-dimensional transient conduction difference equation in the Crank-Nicholson form.
GIVEN One-dimensional transient conduction difference equation in the implicit form FIND (a) The Crank-Nicholson form of the difference equation