А x (m)
B
5
Which of the following line is moving at a faster speed?
OB, because it is the steeper line and covers more distnace in time
O A, because it's a steep line covering more distance over tme
B. because it starts ahead on the graph and gets to the finish first
A because it starts ahead on the graph and get theres first
A because it's not a steep line covering more distance in time
Question 4

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