Gravity is cause by earth's atomoshrepe and it helps keep all living things, like u and me, from going into space and being dead
Answer:
A. Light acts as particles, causing electrons on the surface it strikes to be destroyed.
Explanation:
- The photoelectric effect is a phenomenon that occurs when light shined onto a metal surface causes the ejection of electrons from that metal. It was observed that only certain frequencies of light are able to cause the ejection of electrons.
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.
Newtons first law states an object will only move of something acts on it. his seccond law states that an object will accelerate if an outside force acts on it.