Answer:
ΔS= -1 J/K
Explanation:
Given data
Heat Q= -470J
Temperature T=470 K
To find
Entropy change ΔS
Solution
We know that the entropy change of system is ΔS is given by
ΔS=Q/T
We have take heat value Q as negative because the heat is removed from heat reservoir
So
ΔS=(-470J/470K)
ΔS= -1 J/K
Answer:
the the right because opposites attract to each other
Answer:
The Minimum wavelength is 
The Maximum wavelength is
Explanation:
From the question we are told that
The energy range is 
Considering 
When a single photon is transferred to to an electron the energy obtained can be calculated as follows

This energy is mathematically represented as

Here h is the Planck's constant with value of 
c is the speed of light with value of
Substituting values and making
the subject of the formula


Considering 
When a single photon is transferred to to an electron the energy obtained can be calculated as follows

This energy is mathematically represented as

Substituting values and making
the subject of the formula

Answer: 25N
method: total force in the right hand direction is 100N and total force in the left hand direction is 125N. To get the net force, we add forces if they are in the same direction and substract if they are in opposite directions. since 100N and 125N are in opposite directions, we substract the larger value from the smaller value. Then we get 25N in the left hand direction as the final answer.