Explain Why waves travel at different speeds

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear