9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 16/06/2021
QB365 provides detailed and simple solution for every Book back Questions in class 9 Science Subject. It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 9th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
State Pascal’s law.
2.
Why it is easy to swim in river water than in sea water?
3.
On what factors the pressure exerted by the liquid depends on?
4.
The density of water is 1g cm–3. What is its density in S.I. units?
5.
Density of mercury is 13600 kg m–3. Calculate the relative density.
1.
Pascal's Law states that the external pressure applied on an incompressible liquid is transmitted uniformly throughout the liquid.
2.
It is easier to swim in the sea water as compared to river water, Because sea water has dissolved salts in it, which increases the density of water and also increases its upthrust, so the body sink less and we can easily swim in it as compared to the river water, because river water is less dense than sea water.
3.
Pressure exerted by a liquid at a point is determined by
i) depth (h)
ii) density of the liquid (p)
iii) acceleration due to gravity (g)
4.
Density of water = 1g cm-3
Density in SI unit = ?
1g = 1000 kg/m3
1 cm3 = 1 x 10-6m3
1 g / cm3 = \(= \frac{10^-3}{10^-6}\)= 1000 kg/m3
In SI unit density of water is 1000 kg/m3.
5.
Relative density is a measure of how dense one thing is when compared to a reference, the reference is usually water.
With respect to water, the relative density of 13600 kg m-3 of mercury is 13.6.
ie = \(\frac {13600}{1000}\) = 13.6 times dense as water. (where 1000kg m-3 in the density of water).
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
