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: 15/06/2021
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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.
A piece of aluminium of mass 0.5 kg is heated to 100ºC and then placed in 0.4 kg of water at 10ºC. If the resulting temperature of the mixture is 30ºC, what is the specific heat capacity of aluminium? (SHC of water = 4,200J/KgºC)
2.
Define specific latent heat capacity
3.
What is specific heat capacity?
4.
Differentiate convection and radiation
5.
Ice is kept in a double-walled container. Why?
1.
Given:
Mass of aluminium mA = 0.5 Kg
Sp. heat capacity of aluminium CA = ?
Change in temperature (\(\triangle \)T)A = (100 - 30)
Mass of water mw = 0.4 Kg
Sp. heat capacity of water Cw = 4200 J/Kg0C
(\(\triangle \)Tw) = (30 - 10)
=200C
Solution:
Heat lost by aluminium = Heat gained by water
MA x CA X (\(\triangle \)T)A = mw x Cw x (\(\triangle \)T)w
0.5 X CA x 70 = 0.4 x 4200 x 20
CA = \(\frac { 0.4\times 4200\times 20 }{ 70\times 0.5 } \)
= \(\frac { 6720 }{ 7 } \)
CA = 960 J/kg0C
Specific heat capacity of aluminium = 960 J/kg0C
2.
Latent heat is the amount of heat energy absorbed or released by a substance during a change in its physical state without any change in its temperature.
3.
Specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of 1 kg of the substance by 1oC.
4.
| S.No | Convection | Radiation |
| 1. | It needs particles for transfer of heat | It does not need particles for transfer of heat. |
| 2. | It lacks in electromagnetic waves | Heat flows from one place to another by means of electromagnetic waves |
| 3. | It flows from higher temperature to lower temperature. |
It occurs in a vaccum. |
5.
To avoid the loss of heat due to conduction, convection and radiation, ice is kept in a double walled container.
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
