Finding charge with mass, length and separation

In summary, the charge of an object can be found using the equation Q = (mL)/r, where Q is the charge, m is the mass of the object, L is the length, and r is the separation between the object and another charged object. The unit of measurement for charge is the Coulomb (C). The charge of an object can be negative, indicating an excess of electrons. The mass of an object does not directly affect its charge, but the amount of charge is directly proportional to its mass. The separation in the equation for finding charge represents the distance between the object and another charged object, which affects the strength of the electric field and the amount of charge on the object.
  • #1
Averiex
1
0
I don't even know where to start..

Two styrofoam balls with the same mass (m=9.0x10^-8 kg) and the same positive charge Q are suspended from the same point by insulating threads of length (L=0.98 m). The separation of the balls is (d=0.020 m). What is the charge Q??
 
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  • #2
Welcome to the forum.

First you should sketch the situation. Also include all forces acting on the balls.
 

1. How do you find the charge of an object using its mass, length, and separation?

The charge of an object can be found by using the equation Q = (mL)/r, where Q is the charge, m is the mass of the object, L is the length of the object, and r is the separation between the object and another charged object.

2. What is the unit of measurement for charge?

The unit of measurement for charge is the Coulomb (C).

3. Can the charge of an object be negative?

Yes, the charge of an object can be negative. This indicates that the object has an excess of electrons, which have a negative charge.

4. How does the mass of an object affect its charge?

The mass of an object does not directly affect its charge. However, the amount of charge an object has is directly proportional to its mass, meaning that a heavier object will have a larger charge compared to a lighter object.

5. What is the significance of the separation in the equation for finding charge?

The separation, r, in the equation for finding charge represents the distance between the object and another charged object. This distance affects the strength of the electric field between the two objects and therefore impacts the amount of charge on the object.

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