Aforce can exist between two charged particles or objects even if they're as small as subatomic particles. between which of these would no force exist? select one: a. proton-proton b. neutron-proton c. electron-electron d. proton-electron

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9