Parallel configuration of capacitors is easier to deal with than series configurations. (from an arithmetic point of view)

1.602 x 10-19 Joules

The algebraic sum of all the electric charges in a closed system remains constant. 

 The label of a 2 g vial states that adding 7.4 mL of diluent to the vial will result in a concentration of 200 mg/mL. What concentration (mg/mL) will you achieve if you only add 5.4 mL of diluent to the vial?

a closed loop that current passes through

An electric dipole in a uniform electric field will naturally want to twist due to one of the charges wanting to go with the electric field lines and the other wanting to go against the electric field lines. This twisty force is called __________________. 

 A medication has a concentration of 100 mEq/5 mL. How many milliliters will be prepared to give a 80 mEq dose of this medication?

 An injectable preparation comes packaged as a 0.5 g vial and states that you should add 35 mL to achieve a final concentration of 25 mg/2 mL. How much diluent should you add to achieve a final concentration of 50 mg/mL?

 An injectable medication has been ordered to have a final concentration of 80 mg/mL. The available medication has 1.6 g of dry powder and you are to add 17.4 mL of diluent. What is the powder volume?

the number of vibrations per unit of time