Select Board & Class
name 10 examples of conductors & insulators.
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 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?
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 are 5 examples of bad conductors
WHY DO WE WEAR WOOLEN CLOTHES IN WINTER ?
can a clinical thermometer be used to measure the temperature of boiling water ? why ?
Why are two thin blankets usually warmer then one thick blanket ?
Explain land breeze and sea breeze?
What are the conditions necessary for conduction to take place?
name some bad conductors of heat
why are ventilators made close to the ceilings (give reasons)
Will heat be conducted along the legth of the metal rod when the whole length of the rod has uniform temperature?
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 ?
what is a clinical thermometer?
What are its features and functions?
WHY DOCTORS DIP THE THERMOMETER IN A LIQUID BEFORE USE? WHY IS IT KEPT UNDER THE TONGUE
(1) The handle of tawa is covered with wood
(2) Why do electric wires sag in summer?
(3) It is advisable to wear white or light coloured clothes on a hot day.
(4) The windows of the houses in coastal areas are made to face the sea.
what are the conditions required for conduction fo heat?
why does an aluminium window frame feel colder to touch than a wooden frame?
Shopkeepers selling ice blocks usually cover with jute sacks? Why?
Q6. Give reasons for the following
WHY THE THERMOMETER IS KEPT UNDER THE TONGUE?
why do solid objects cool faster than liquid?
Mud house are cool in summer and hot in winter . why ???????
is human body an insulator or conductor of heat
What happens to radiant heat when it falls on body?
A short-note on Green House ?
ii Why electric room heaters are provied with a polished metal surface behind the heating element?
Slabes of ice are covered with saw dust or gunny bags.Give reason.
why is well water warmer in winter and cooler in summer?
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?
explain why gases expand more than liquis and solids
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 !!
what is kink present in thermometer
In a room it is best to place a room heater on the floor but an air conditioner near the ceiling.why?
why mercury does not fall or rise in a clinical themometer when taken out of the mouth?
why are car radiators painted black?
what is the difference between conduction, convection and radiation?
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?
Why do wet clothes dry faster in winter than in the rainy season?
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?
What is white petrol?
WHATS THE DIFFERENCE BETWEEN A DIGITAL AND A CLINICAL THERMOMETER?(ANY 3 POINTS)
a clinical thermometer has the range of 35 degree to 42 degree .why
what is conductor and insulator . give some examples ?
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