Select Board & Class
name 10 examples of conductors & insulators.
GIVE AN EXPERIMENT TO SHOW THAT WOOD IS A BAD CONDUCTOROF HEAT?
IN WHICH MEDIUM DOES CONVECTION TAKE PLACE? WHAT ARE THE FACTORS REQUIRED FOR IT?
WHAT ARE GOOD AND BAD CONDUCTORS OF HEAT? EXPLAIN WITH EXAMPLES.
why we can't use laboratory thermometer to measuring human body temperature
why does a clinical thermometer have a kink?
Test solution Effect on red litmus paper Effect on blue litmus paper Inference
Lemon juice No change Red Acidic
Tap water No change No change Neutral
Detergent solution Blue No change Basic
Aerated Drink Blue No change Basic
Soap solution Blue No change Basic
Shampoo Blue No change Basic
Common Salt solution No change No change Neutral
Sugar solution No change No change Neutral
Vinegar No change Red Acidic
Baking soda solution Blue No change Basic
Milk of magnesia Blue No change Basic
Washing soda solution Blue No change Basic
Lime water Blue No change Basic
Test solution Effect on turmeric solution Remarks
Lemon juice No colour change Acidic
Orange juice No colour change Acidic
Vinegar No colour change Acidic
Milk of magnesia Red Basic
Baking soda Red Basic
Lime water Red Basic
Sugar No colour change Neutral
Common salt No colour change Neutral
What about sugar and common salt with turmeric solution? How do we conclude about the nature?
what are 5 examples of bad conductors
WHY DO WE WEAR WOOLEN CLOTHES IN WINTER ?
ii Why electric room heaters are provied with a polished metal surface behind the heating element?
can a clinical thermometer be used to measure the temperature of boiling water ? why ?
What are the conditions necessary for conduction to take place?
Why are two thin blankets usually warmer then one thick blanket ?
why are car radiators painted black?
Explain land breeze and sea breeze?
Two test tubes full of water are heated -one from below and the other from near the top. In which case will the water heat up faster and why?
name some bad conductors of heat
why are ventilators made close to the ceilings (give reasons)
precautions while reading a clinical thermometer?
why black colour umbrella is used in summer than a white one
Why is water a bad conductor of heat ?
WHY DOCTORS DIP THE THERMOMETER IN A LIQUID BEFORE USE? WHY IS IT KEPT UNDER THE TONGUE
what is a clinical thermometer?
What are its features and functions?
why does an aluminium window frame feel colder to touch than a wooden frame?
why can't heat pass in vaccum by the mean of conduction and convection
Shopkeepers selling ice blocks usually cover with jute sacks? Why?
WHY THE THERMOMETER IS KEPT UNDER THE TONGUE?
why is well water warmer in winter and cooler in summer?
Mud house are cool in summer and hot in winter . why ???????
What happens to radiant heat when it falls on body?
A short-note on Green House ?
KING OF ACID
KING OF NEUTRAL
KING OF BASE
Slabes of ice are covered with saw dust or gunny bags.Give reason.
why do we feel hot when we sit under the sun directly
Q4 why laboratory thermometer does not have a kink?
Q5 what precautions will you observe while using a clinical thermometer?
Q6 describe an experiment to show convection currents in a liquids.
why do we wear woollen clothes in winter & cotton clothes in summer?
Why do wet clothes dry faster in winter than in the rainy season?
explain why gases expand more than liquis and solids
What is the lower point of an ordinanary laboratry thermometer
what is kink present in thermometer
what are the conditions required for conduction fo heat?
why mercury does not fall or rise in a clinical themometer when taken out of the mouth?
The outer walls of some buildings are painted black during summers to absorb heat energy.
Answer in true/false?If false then what is the right answer?
what is the difference between conduction, convection and radiation?
describe an experiment to show convection current in liquid
A wooden spoon is dipped in a cup of ice cream. Its other end
(a) becomes cold by the process of conduction.
(b) becomes cold by the process of convection.
(c) becomes cold by the process of radiation.
(d) does not become cold.
is the answer to this (d) does not become cold?
why wearing more layers of clothing during winter keeps us wrmer than wearing just one thickpiece of clothing?
In a room it is best to place a room heater on the floor but an air conditioner near the ceiling.why?
WHY DO PEOPLE PREFER TO WEAR DARK CLOTHES IN WINTER AND LIGHT CLOTHES IN SUMMER?(HERE LIGHT MEANS LIGHT COLUORED CLOTHES FOR EG.WHITE)
Q: why are you advised to use an umbrella when you go out in the sun?
mode of heat transfer in
1) A paper cup full of hot soup lying on the table
2) cooking vegetables in a pan
What is ice point and what is steam point?
why do solid objects cool faster than liquid?
What is white petrol?
WHATS THE DIFFERENCE BETWEEN A DIGITAL AND A CLINICAL THERMOMETER?(ANY 3 POINTS)
Does radiation takes place in solids,liquids or gases?
a clinical thermometer has the range of 35 degree to 42 degree .why
name the mode of heat transfer in which heat energy flows from one body tom another only if they are in contact with each other ?
what is conductor and insulator . give some examples ?
why does a cement floor feel colder than a wooden floor?
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Syllabus
name 10 examples of conductors & insulators.
GIVE AN EXPERIMENT TO SHOW THAT WOOD IS A BAD CONDUCTOROF HEAT?
IN WHICH MEDIUM DOES CONVECTION TAKE PLACE? WHAT ARE THE FACTORS REQUIRED FOR IT?
WHAT ARE GOOD AND BAD CONDUCTORS OF HEAT? EXPLAIN WITH EXAMPLES.
(i) What is the quantity of heat released per kg of water per 1C fall in temperature?
(ii) Calculate the heat energy released by water in the experiment in cooling from 70C to 45C.
(iii) Assuming that heat released by water is entirely used to raise the temperature of calorimeter 15C to 45C, calculate the specific heat capacity of copper. (Specific heat capacity of water = 4200 Jkg-1ºC-1.
why we can't use laboratory thermometer to measuring human body temperature
why does a clinical thermometer have a kink?
Test solution Effect on red litmus paper Effect on blue litmus paper Inference
Lemon juice No change Red Acidic
Tap water No change No change Neutral
Detergent solution Blue No change Basic
Aerated Drink Blue No change Basic
Soap solution Blue No change Basic
Shampoo Blue No change Basic
Common Salt solution No change No change Neutral
Sugar solution No change No change Neutral
Vinegar No change Red Acidic
Baking soda solution Blue No change Basic
Milk of magnesia Blue No change Basic
Washing soda solution Blue No change Basic
Lime water Blue No change Basic
Test solution Effect on turmeric solution Remarks
Lemon juice No colour change Acidic
Orange juice No colour change Acidic
Vinegar No colour change Acidic
Milk of magnesia Red Basic
Baking soda Red Basic
Lime water Red Basic
Sugar No colour change Neutral
Common salt No colour change Neutral
What about sugar and common salt with turmeric solution? How do we conclude about the nature?
what are 5 examples of bad conductors
WHY DO WE WEAR WOOLEN CLOTHES IN WINTER ?
ii Why electric room heaters are provied with a polished metal surface behind the heating element?
can a clinical thermometer be used to measure the temperature of boiling water ? why ?
What are the conditions necessary for conduction to take place?
Why are two thin blankets usually warmer then one thick blanket ?
why are car radiators painted black?
Explain land breeze and sea breeze?
Two test tubes full of water are heated -one from below and the other from near the top. In which case will the water heat up faster and why?
name some bad conductors of heat
why are ventilators made close to the ceilings (give reasons)
precautions while reading a clinical thermometer?
why black colour umbrella is used in summer than a white one
Why is water a bad conductor of heat ?
WHY DOCTORS DIP THE THERMOMETER IN A LIQUID BEFORE USE? WHY IS IT KEPT UNDER THE TONGUE
what is a clinical thermometer?
What are its features and functions?
What about sugar and common salt with turmeric solution? How do we conclude about the nature?
why does an aluminium window frame feel colder to touch than a wooden frame?
why can't heat pass in vaccum by the mean of conduction and convection
Shopkeepers selling ice blocks usually cover with jute sacks? Why?
a)SOLIDS b)LIQUIDS
c)GASES
KINDLY CLEAR THE QUERY..
:-)
WHY THE THERMOMETER IS KEPT UNDER THE TONGUE?
why is well water warmer in winter and cooler in summer?
Mud house are cool in summer and hot in winter . why ???????
What happens to radiant heat when it falls on body?
a) A beaker whose surface is covered with aluminium foil.
b) A beaker whose surface is painted black.
A short-note on Green House ?
KING OF ACID
KING OF NEUTRAL
KING OF BASE
Slabes of ice are covered with saw dust or gunny bags.Give reason.
why do we feel hot when we sit under the sun directly
Q4 why laboratory thermometer does not have a kink?
Q5 what precautions will you observe while using a clinical thermometer?
Q6 describe an experiment to show convection currents in a liquids.
why do we wear woollen clothes in winter & cotton clothes in summer?
Why do wet clothes dry faster in winter than in the rainy season?
explain why gases expand more than liquis and solids
What is the lower point of an ordinanary laboratry thermometer
what is kink present in thermometer
what are the conditions required for conduction fo heat?
why mercury does not fall or rise in a clinical themometer when taken out of the mouth?
The outer walls of some buildings are painted black during summers to absorb heat energy.
Answer in true/false?If false then what is the right answer?
what is the difference between conduction, convection and radiation?
describe an experiment to show convection current in liquid
A wooden spoon is dipped in a cup of ice cream. Its other end
(a) becomes cold by the process of conduction.
(b) becomes cold by the process of convection.
(c) becomes cold by the process of radiation.
(d) does not become cold.
is the answer to this (d) does not become cold?
why wearing more layers of clothing during winter keeps us wrmer than wearing just one thickpiece of clothing?
In a room it is best to place a room heater on the floor but an air conditioner near the ceiling.why?
WHY DO PEOPLE PREFER TO WEAR DARK CLOTHES IN WINTER AND LIGHT CLOTHES IN SUMMER?(HERE LIGHT MEANS LIGHT COLUORED CLOTHES FOR EG.WHITE)
Q: why are you advised to use an umbrella when you go out in the sun?
mode of heat transfer in
1) A paper cup full of hot soup lying on the table
2) cooking vegetables in a pan
why is a clinical thermometor given a jerk before use ??
What is ice point and what is steam point?
why do solid objects cool faster than liquid?
What is white petrol?
WHATS THE DIFFERENCE BETWEEN A DIGITAL AND A CLINICAL THERMOMETER?(ANY 3 POINTS)
Does radiation takes place in solids,liquids or gases?
a clinical thermometer has the range of 35 degree to 42 degree .why
name the mode of heat transfer in which heat energy flows from one body tom another only if they are in contact with each other ?
what is conductor and insulator . give some examples ?
why does a cement floor feel colder than a wooden floor?