Students from Molly's middle school wanted to know if the amount of milk that a cow produces is affected by the cow's age. The students measured the milk from four cows that were 2,4,6,
and 8 years old. They measured how much milk each cow produced each day for four days.
The cows were the same breed, lived on the same farm, and were fed the same amount and
type of hay.
IV:
DV:

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation:

answer: 45

explanationyou have to add as well to be it could be

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave