Answer:
c. Case iii
Explanation:
the ball will experience the largest change in case iii
Answer would be D sorry if wrong
Answer:
Work function of the metal, 
Explanation:
We are given that
Frequency of the electromagnetic radiation, 
Hz
The maximum kinetic energy of the emitted electron, 
We need to find the work function of the metal.
We know that the maximum kinetic energy of ejected electron
Where h=Plank's constant=
=Frequency of light source
=Work function
Substitute the values in the given formula
Then, the work function of the metal is given by :
So, the work function of the metal is 
. Hence, this is the required solution.
A)
Q=606 J
<span> W = 418 J
</span><span> From first law of thermodynamics,
</span><span> [ Uf - Ui ] = Q - W
</span><span> [ Uf - Ui ]=606 -418=188 J
</span><span> [ Uf - Ui ]= 188 J
</span><span>
b )
W2 = 1212 J
</span><span> Q2 = ?
</span><span> Ui2=Uf =Ui +188
</span><span> Uf2=Ui
</span> [ Uf2 - Ui2 ]<span>=Ui-(Ui+188)
</span><span> -188 J
</span><span> Q2=W2+(Uf2 -Uf1)
</span><span> Q2 =1212 -188=1024 J
</span><span> Q added in second step (b) so that internal energy is equal to initial internal energy of step (a)=1024 J</span>
