2. In which of the following graphs below are both runners moving at the same speed? Explain your answer. 3. The distance-time graphs below represent the motion of a car. Match the descriptions with the graphs. Explain your answers.
a. Descriptions:
i. The car is stopped.
ii. The car is traveling at a constant speed.
iii. The speed of the car is decreasing.
iv. The car is coming back.

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