Electric Charge and Force Calculation Help

[Farside]

I missed the material for these couple of problems. If someone could help explain how to solve them I would much appreciate it.

1.) A charge of +2 x 10^-6 C is 20cm from a charge of -3 x 10^-6 C. Find the magnitude and direction of the force on each charge.

2.) A 120-V electric coffeepot draws a current of 0.6 A. What is the resistance of its heating element?

 

[Doc Al]

1.) A charge of +2 x 10^-6 C is 20cm from a charge of -3 x 10^-6 C. Find the magnitude and direction of the force on each charge.

Look up Coulomb's law.

2.) A 120-V electric coffeepot draws a current of 0.6 A. What is the resistance of its heating element?

Look up Ohm's law.

 

[Theelectricchild]

$$F_E = \frac{Q_1Q_2}{4\pi\epsilon_0r^2}$$

$$V = IR$$

 

[Theelectricchild]

Also Newtons Third Law should help you determine the force on EACH charge to your first question.