Grade 8 science does anyone know the answer to this science question? does a short wavelength mean the rarefactions are close together or far apart? they are further apart. they are close together. they are at the same distance.

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature

What is the percent by mass of oxygen in fe2o3