What scientific term is a well-tested explanation for a set of observations or experimental results? a.) law b.) theory c.) conclusion d.) method

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?