6. Some hikers travel 2 km north, turn toward the west and travel 4km, turn toward the south and
travel 6 km, then finally travel east for 4 km.
what is the displacement from the starting point.

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m