What do these observations tell you about the rate and direction of heat flow through each specific type of plastic?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false