Solving for acceleration, mass and net force

Agalvanometer has an internal resistance of 100 ω and deflects full-scale at 2.00 ma. what size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 ma, and how should this resistor be connected to the galvanometer?

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

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?