Agroup of students is investigating whether copper is a better thermal conductor than aluminum. the students take a copper wire and an aluminum wire of the same length and diameter. they put equal lengths of wax on one end of each wire and dip the other ends into a beaker of hot water. the length of wax left on the wires after 10 minutes is shown. experimental observations copper aluminum original length of wax 2 cm 2 cm length of wax after 10 minutes 0.7 cm 1.2 cm what was the independent variable in this experiment?

In the mentioned experiment, three kinds of variables are used, that is, the independent variable, the dependent variable, and the controlled variable. Of these the independent variables are the one that does not get modify, however, can be modified by the scientist, while the dependent variables are the one that modifies when the independent variables modify, and the controlled variables are the ones that are maintained same throughout.  

In the given experiment, the length of the wire, the type of the wire utilized, and the thermal conductivity of the wire are the independent variables.  

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.