An element like silicon is not usually used to make wires or pans because it . can leave behind traces of radioactivity
Is not very abundantly found on Earth
is not good conductors of electricity or heat
is not solid at room temperature

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.