What will create static electricity? a) rubbing a plastic comb on a piece of wool b) flipping on a light switch in your classroom c) allowing like forces to attract (negative attracts negative) d) wrapping wire around iron and sending a charge through the wire

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

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.)