Scientists bred the moths and figured out that the light-colored form of the peppered moth has different genes from the dark form. The black color of the dark form was due to a mutation in the DNA of the light-colored form.
Answer:
W = 234 J
Explanation:
Initial volume of air is given as
finally it is expanded isothermally to new pressure of 101.3 kPa
now by isothermal expansion we know
So work done in above process is given as
Now it is cooled to initial volume at constant pressure
so here in this case work done is given as
Now total work done is given as
The relationship between resistance R and resistivity
is
(1)
where L is the length of the wire and A is the cross-sectional area.
In our problem, the radius of the wire is half the diameter: r=1 mm=0.001 m, so the cross-sectional area is
The length of the wire is L=20 m and the resistance is
.
By re-arranging equation (1), we can find the resistivity of the wire:
V=f*lambda .. so make lambda the subject.. Lambda is equal to V/ F ... the answer is 6.66*10^3. I converted km to meters
Its B , Lizabeth thinks Miss Lottie and her marigolds are strange, and her frustration with her own life drives Lizabeth to destroy the women's flowers.