Physics, 07.04.2020 00:44 c4thegoat

Two stationary positive point charges, charge 1 of magnitude 3.00 nC and charge 2 of magnitude 1.80 nC , are separated by a distance of 31.0 cm . An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed vfinal of the electron when it is 10.0 cm from charge 1?

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Answer from: Wookas8355

The velocity is v= 5.9*10^6 m/s

Explanation:

Generally the the potential at the middle of the two individual charges is mathematically represented as

$V_1 = k [\frac{q_1}{\frac{d}{2} } + \frac{q_2}{\frac{d}{2} } ]$

Substituting 9*10^9N for k (Coulomb constant ) , $3.95*10^{-9} C$ for q_1 , $1.80*10^{-9}C$ for q_2 and 31.0cm= $\frac{31}{100} = 0.31m$ for d

$V_1 = (9*10^9) [\frac{3.95*10^{-9} ]}{\frac{0.31}{2} } + \frac{1.80*10^{-9}}{\frac{0.31}{2} } ]$

= 333.87V

The potential at 10cm from charge 1 is mathematically evaluated as

$V_2 = k [\frac{q_1}{d_1} + \frac{q_2}{d_2} ]$

Substituting 10cm = $\frac{10}{100} = 0.10m$ for d_1 , (31-10)cm = $\frac{(31-10)}{100} = 0.21m$ for d_2 and the rest of the values

$V_2 = (9*10^9) [\frac{3.95*10^{-9}}{0.10} + \frac{1.80 *0^{-9}}{0.21} ]$

=432.64V

According to the law of conservation of energy

The difference in potential energy is equal to the kinetic energy

KE = ( V_2 -V_1 )

Where is the charge on an electron

$\frac{1}{2} mv^2 = (V_2 - V_1)q$

substituting $9.1*10^{-31} kg$ for m (mass of electron) , $1.602 *10^{-19}C$ for q (charge on an electron) , and making v the subject

$v = \sqrt{\frac{2(432.64-333.87) * 1.602*10^{-19}}{9.1*10^{-31}} }$

v= 5.9*10^6 m/s

Answer from: Quest

relativism, roughly put, is the view that truth and falsity, right and wrong, standards of reasoning, and procedures of justification are products of differing conventions and frameworks of assessment and that their authority is confined to the context giving rise to them. more precisely, “relativism” covers views which maintain that—at a high level of abstraction—at least some class of things have the properties they have (e.g., beautiful, morally good, epistemically justified) not simpliciter, but only relative to a given framework of assessment (e.g., local cultural norms, individual standards), and correspondingly, that the truth of claims attributing these properties holds only once the relevant framework of assessment is specified or supplied. relativists characteristically insist, furthermore, that if something is only relatively so, then there can be no framework-independent vantage point from which the matter of whether the thing in question is so can be established.

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explanation:

Answer from: Quest

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Two stationary positive point charges, charge 1 of magnitude 3.00 nC and charge 2 of magnitude 1.80...

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