1. A car slams on brakes and comes to a stop after having been traveling 40m/s. The car stops in only 0.5s. What is the car's acceleration? (Units for acceleration should be typed as m/s/s right
next to the number!)

answerdmitry mendeleyev made a workable classification of the elements

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