Three spheres A, B, and C are placed in a line from left to right. Sphere B (-5.0 PC ) is 30 cm to the right of sphere A (-4.0 uC ) and sphere C (+6.0 PC ) is 50 cm to the right of sphere B. What is the net force
acting on sphere A?
x N to the left
A
B
С
30 cm
50 cm
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80cm/s.

24cm/s.

53.3cm/s.

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