Test information description instructions multiple attempts this test allows 3 attempts. this is attempt number 1 force completion this test can be saved and resumed later question completion status: 2 points question1 a closed rigid vessel contains 0.4 m3 of air, at an absolute pressure of 300 kpa, and has its temperature of 314 k. it is then heated to 587 k. given that the specific heat capacities of the air are cp = 1005 j/kgk and c-718 jkgk. determine the change of entropy (in kj/k, 3 sig. save an save all answers click save and submit to save and submit. click save all answers to save all ansuwers.

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

answer: the potential energy decreases from 379 j to 243 j

explanation:

for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:

e = k + u

the total energy is e=675 j, and this does not change.

initially, the kinetic energy is k=296 j, so the potential energy is

at the end, the kinetic energy is k=432 j, so the potential energy is

so, we see that the potential energy has decreased from 379 j to 243 j.