Answer:
Law of conservation of momentum states that "The total momentum of an isolated system always remains constant"
Or
"In an isolated system the total momentum of the interacting bodies remains constant before and after collision or interaction".
Answer:
The correct answer for A P E X is A. a neap tide
Explanation:
I took the test
We know
Pa=Patm+dgh+dgl
here Pa is pressure in pipe with higher level of liquid
Patm is atmospheric pressure
d is density
g is gravitational constant
h is height of lower liquid
l is difference is height of higher liquid
So Pb= Patm+dgh
here Pb is pressure lower level pipe
so
Pdiff=Pb-Pa
Pdiff=-dgl
We know
Density of kerosene is the reciprocal of it’s specific volume
so d=1/v=1/0.00122=820kg/m3
as g=9.81 and l=12cm
Pdiff= - 820*9.81*12/100
Pdiff = -965.304 Pa
Negative sign shows pressure decreases as the kerosene flows from point A
to point B as the pipe diameter decreases.