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ambermcneil3839
09.11.2019 •
Physics
Example 4
a)
estimate the electric field strength at a point x that is 10 nm from a gold nucleus, which
is assumed to be a point charge (atomic number: gold, 79)
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Ответ:
E = 1.14 x 10⁹ V/m
Explanation:
Given,
The atomic number of gold, A = 79
The number of protons present in the nucleus, p = 79
The charge of a proton, q = 1.602 x 10⁻¹⁹ C
Therefore the total charge is, Q = 79 x 1.602 x 10⁻¹⁹
= 1.26558 x 10⁻¹⁷ C
The distant from the point charge, x = 10 nm
The electric field strength at a distant x is given by,
Substituting the values in the above equation
E = (9 x 10⁹ X 1.26558 x 10⁻¹⁷) / (10 x 10⁻⁹)²
E = 1.14 x 10⁹ V/m
Hence, the electric field strength is, E = 1.14 x 10⁹ V/m
Ответ:
(( A single muscle is made up of many “bundles” (or fasciculi) of muscle cells or fibers held together by connective tissue (perimysium). ))