: A 100 kg box is initially at rest on a horizontal surface where the coefficient of friction is 0.25. A tension force of 1000 N is exerted on the box at an angle of 37 degrees from the horizontal. What is the normal force acting on the box?What is the acceleration of the box?

not moving. pos accel,

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