A charge Q is spread uniformly along the circumference of a circle of radius R. A point particle with charge q is placed at the center of this circle. The total force exerted on the particle q can be calculated by Coulomb's law:
A) if you use R for the distance
B) if you use 2R for the distance
C) if you use 2?R for the distance
D) and the result of the calculation is zero
E) none of the above
D) and the result of the calculation is zero
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Process of Science: What would you say to a friend who thinks that the general theory of relativity is a beautiful example of abstract thinking by humankind that explains extreme phenomena in astrophysics but has no application to everyday life?
What will be an ideal response?
When uranium emits a beta particle, the result is
A) a uranium ion. B) a different isotope of uranium. C) the first transuranic element. D) all of the above E) none of the above
The length of a telescope is 2.00 m and the focal length of the objective lens is 2.0 cm. What is the focal length of the eyepiece?
A) 200 cm B) 202 cm C) 101 cm D) 2.0 cm E) 198 cm
Light with a wavelength of 450 nm shines through a lens with an aperture diameter of 0.85 cm. Use Rayleigh's criterion to determine the limiting angle of resolution. (1 nm = 10-9 m)
a. 6.5 × 10^-5 rad c. 9.2 × 10^-5 rad b. 1.3 × 10^-4 rad d. 3.0 × 10^-9 rad