The answer is machines, and object. I hope this helps.
Answer: d. the distance between two rarefactions,
Explanation:
Wavelength is the distance between two identical adjacent points in a wave. This means that it is the distance between two adjacent compressions or two adjacent rarefactions.
Wavelengths are inversely related to frequency because the longer the wavelength, the less the number of wave cycles per second.
The needs of future generations
They have high melting and boiling points and are hard and brittle
Answer:
The answer is D
Explanation:
Animals add color to their environment so a mate can see how creative the animal is.
