Explanation:
In the plane of the Solar System, called Ecliptic plane, Sun is at the center and all the planets including Earth are going around the Sun in their respective orbits. As seen form the Earth, Sun appear to go around it and in this process it crosses through 12 constellations. These constellations are called as Zodiacs. Now since all the planets move in almost the same plane, they will appear in the sky to be lying near the ecliptic.
Sun's own motion is not that evident to us because of which the impact of that motion is nullified. But, motion of planet is clearly visible and it also shows in their annual round around the Sun. Here, Mars also shows retrograde motion which means it will show a back and forth motion in the sky. Because of which Mars might be visible in the same zodiac for a longer Duration as compared to the Sun.
As you move down a column :
* the atomic number increases
* the number of protims increases
* the atomic mass increases
* the electronegativity decreases
Relative velocity is the velocity of an object or observer B in the rest frame of another object or observer A
Answer:
Carroll has spent his career studying how evolution occurs at the genetic level, pinpointing many of the molecular changes that lead to new traits and new species. Most of Carroll's discoveries have come to light by studying the common fruit fly Drosophila melanogaster, the workhorse of modern molecular genetics.
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Answer:
1. it is laminar flow
2. it is not fully developed
3.Re=63.156
4. entrance length is the entrance diameter which is 4.1-mm-
Explanation:
A soft drink with the properties of 10 oC water is sucked through a 4.1-mm-diameter, 0.25-m-long straw at a rate of 4.1 cm3/s.
(a) Is the flow at the outlet of the straw laminar?
(b) Is it fully developed? To explain calculate
(c) the Reynolds number and
(d) the entrance length
note te following
For&pipe&flow:&
Re&<&2100 laminar&flow&
Re&>&4000 turbulent&flow&
kinematic viscosity of water at 10 oCis 1.267E-6m^2/S
Re=vl/k.viscosity
v=q/A
q=4.1 cm3/s=4.1*10^-6m3/s
A=3.142*0.0041/4
A=0.00322m2
v=0.000318m/s
l= 0.25-m
RE=0.000318m/s*0.25/( 1.267E-6m^2/S)
Re=63.156
since re<2100 , it is laminar flow
2. it is not fully developed
3.Re=63.156
4. entrance length is the entrance diameter wic is 4.1-mm-
