Coulomb's Law

A 5 C and 8 C are 8 m apart. What is the force between them?

• 5.625 x 10⁹

• 5.625 x 10^-9

• 4.5 x 10¹⁰

• 4.5 x 10^-10

A 5 C and 8 C charge give off a force of 2.5 x 10⁹ N. What is the distance between them?

• 11 m

• 12 m

• 121 m

• 144 m

A repulsive force exists between which two particles?

• Two neutrons

• An electron and a neutron

• An electron and a proton

• Two electrons

Which two particles are attracted to each other?

• Two neutrons

• A proton and an electron

• Two protons

• An electron and a neutron

A charge of 3 C is 27 m away from another charge. They exert a force of -2.59 x 10⁸ N on each other. What is the 2nd charge?

• 5 C

• -5 C

• 7 C

• -7 C

A charge of 4 C and -7 C are 200 m apart. What is the force between them?

• 6.3 x 10⁶

• -6.3 x 10⁶

• 2.52 x 10¹¹

• -2.52 x 10¹¹

What is the electric force between a 2.5 C charge and a negative 1 C charge when they are separated by a distance of 20 m?

• 1,125,000,000 N

• 56,250,000 N

• 0.125 N

• 0.00625 N

Two charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be 

• 10 N
• 5 N
• 2.5 N
• 40 N