On a frictionless plane inclined at angle 303. the box is connected via a cord of negligible mass to a box of laundered money (mass m2 " 2.0 kg) on a frictionless plane inclined at angle u2 " 603. the pulley is frictionless and has negligible mass. what is the tension in the cord?

 T = 1.73 kg

Explanation:

Let's use Newton's second law for this balance problem

We draw a coordinate system with the x axis parallel to the plane and the Y axis perpendicular

The only force we have to lay down is the weight (W)

       Wx = W sin θ

       Wy = W cos θ

       Wx = 2.0 ain 60  

       Wx = 1.73 kg

       Wy = 2.0 cos 60

       Wy = 1.0 kg

Y Axis

      N-Wy = 0

X axis

      T- Wx = 0

      T = Wx

      T = 1.73 kg

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