What is the relationship between frequency, wavelength, and speed of a wave as the wave travels through different media?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

What natural processes produce large quantities of co2

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?