A dust particle through an electric field

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Homework Help Overview

The discussion revolves around a problem involving a dust particle with a specified mass traveling through an electric field, where the electric force on the particle is stated to be equal to its weight. The primary question is to determine the charge on the dust particle based on the given parameters.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the calculation of the charge using the relationship between force, mass, and electric field. There are inquiries regarding significant figures and unit considerations in the calculations presented.

Discussion Status

The discussion is ongoing, with participants providing feedback on the attempts made. Some guidance has been offered regarding the importance of clarity in questions and the need for detailed reasoning in problem-solving.

Contextual Notes

Participants note the importance of significant figures and units in the calculations, suggesting that these aspects may need further attention. There is also a reminder for the original poster to articulate specific questions to facilitate more targeted assistance.

baker265
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Homework Statement


A small piece of dust of mass m = 3.8 mu or micro g (micrograms) travels through an electric air cleaner in which the electric field is 526 N/C. The electric force on the dust particle is equal to the weight of the particle.

(a) What is the charge on the dust particle?


Homework Equations


F=ma
q=F/E


The Attempt at a Solution


((3.8*10^-9)*9.81)/526=7.079*10^-11
 
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baker265 said:

Homework Statement


A small piece of dust of mass m = 3.8 mu or micro g (micrograms) travels through an electric air cleaner in which the electric field is 526 N/C. The electric force on the dust particle is equal to the weight of the particle.

(a) What is the charge on the dust particle?


Homework Equations


F=ma
q=F/E


The Attempt at a Solution


((3.8*10^-9)*9.81)/526=7.079*10^-11

Two things: 1) no. of sig figs you can give the result to and 2) lack of units. Other than that, looks right. Is there a question?
 
Okay, thanks! I just wanted to make sure I was doing it correctly.
 
What he said.
Always, please, show your reasoning and working.
Always ask a specific question so we don't have to guess what you want.

Oh... welcome to PF BTW.
 

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