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name 10 examples of conductors & insulators.
why we can't use laboratory thermometer to measuring human body temperature
WHAT ARE GOOD AND BAD CONDUCTORS OF HEAT? EXPLAIN WITH EXAMPLES.
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 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
What is the purpose of constriction in the clinical thermometer?
WHY DO WE WEAR WOOLEN CLOTHES IN WINTER ?
why are car radiators painted black?
can a clinical thermometer be used to measure the temperature of boiling water ? why ?
How does the uneven heating of the Earth lead to the generation of wind currents?
There are two situations that lead to the generation of wind currents:
i. Uneven heating of the Equator and the Poles: The Equator receives the maximum amount of heat from Sun. The air in the region of the 0 − 30° latitude belt on either side of the Equator becomes warm and moves toward the Equator from both sides. The air near the latitude of 60° in both the hemispheres is warmer than the air near the Poles. Hence, the warm air around these latitude belts rises up and the cold air from the Polar Regions rushes in to occupy the empty space. Thus, the uneven heating of the Equator and the Poles causes the circulation of wind that leads to the generation of wind currents.
ii. Uneven heating of land and water: In the summer months, land heats up faster than the sea. The air above the land gets heated up and rises. This causes winds to blow from the sea to the land. In winters the direction of wind is reversed. Thus, it causes circulation of winds.
is this true ?? please answer fast !!
Why are two thin blankets usually warmer then one thick blanket ?
Explain land breeze and sea breeze?
name some bad conductors of heat
why are ventilators made close to the ceilings (give reasons)
precautions while reading a clinical thermometer?
Why is water a bad conductor of heat ?
what is a clinical thermometer?
What are its features and functions?
why black colour umbrella is used in summer than a white one
Why will a thick glass tumbler break when hot water is put into it ? Why will the outer surface crack ?
explain why gases expand more than liquis and solids
why is well water warmer in winter and cooler in summer?
why does an aluminium window frame feel colder to touch than a wooden frame?
Shopkeepers selling ice blocks usually cover with jute sacks? Why?
What is ice point and what is steam point?
WHY DOCTORS DIP THE THERMOMETER IN A LIQUID BEFORE USE? WHY IS IT KEPT UNDER THE TONGUE
WHY THE THERMOMETER IS KEPT UNDER THE TONGUE?
What happens to radiant heat when it falls on body?
Mud house are cool in summer and hot in winter . why ???????
A short-note on Green House ?
a 10 degree celsius fall in temperature is equal to _________________
how are trade winds caused?
Slabes of ice are covered with saw dust or gunny bags.Give reason.
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?
what is kink present in thermometer
why mercury does not fall or rise in a clinical themometer when taken out of the mouth?
what are the conditions required for conduction fo heat?
what is the difference between conduction, convection and radiation?
metal pots are often made shiny on the surface outside espcially on the top and side that makes sense thermally because this
a)conducts heat better
b)radiates less energy out of the pot
c)lowers the loss due to conduction
d)appreciably decreases convection losses
why wearing more layers of clothing during winter keeps us wrmer than wearing just one thickpiece of clothing?
What is the lower point of an ordinanary laboratry thermometer
WHY DO PEOPLE PREFER TO WEAR DARK CLOTHES IN WINTER AND LIGHT CLOTHES IN SUMMER?(HERE LIGHT MEANS LIGHT COLUORED CLOTHES FOR EG.WHITE)
Why do wet clothes dry faster in winter than in the rainy season?
What is the unit of heat energy in SI & FPS System ?
mode of heat transfer in
1) A paper cup full of hot soup lying on the table
2) cooking vegetables in a pan
Q: why are you advised to use an umbrella when you go out in the sun?
What is white petrol?
WHATS THE DIFFERENCE BETWEEN A DIGITAL AND A CLINICAL THERMOMETER?(ANY 3 POINTS)
who invented clinical thermometer and laboratory thermometer
a clinical thermometer has the range of 35 degree to 42 degree .why
value based questions
nitika's neighbour ,Mrs Sharma , is an old lady and lives alone .she doesn't keep well .nitikatakes some hot home -madevegetables soup made by her mother ,in a thermos flask for her.
1.why does nitika's mother use a thermos flask ?
2. what value can we learn from nitika?
what is conductor and insulator . give some examples ?
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?
what happens when a steel rod is heated? It will become....
A)Lighter B)Heavier C)A little longer D)A little shorter
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