The molecules of a gas are in constant random motion. This means that they have energy in what type of energy store?

Newtons view of arrangement of the universe

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)