Awave has a wavelength of 7 mm and a frequency of 13 hertz. what is its speed?

0.091 m/s

Explanation:

Given in the question that,

wavelength of a wave = 7mm

frequency of a wave = 13 hertz

Formula to use

here f = frequency in hertz

        v = velocity in m/s

        λ = wavelength in m

1 mm = 1x10

7mm = 7x10

Plug values in the formula

 13 = v / 7x10

  v =   13(7x10^{-3})

  v = 0.091 m/s

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: