A physics teacher assigns research to its students. The objective is to change the size of the batteries in order to
investigate the effects on the luminosity of the light bulb.

Which quantity is the independent variable?

Which quantity is the dependent variable?

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

Avoltaic cell converts chemical energy to

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.