CBSE X Physics Electricity
- .An ELECTRIC IRON has a rating750W;220Vcalculate:
- [R] resistance
- [I] current
- why is fuse had to have lowmeltingpoint & high resistivity?
- .An ELECTRIC IRON has a rating750W;220Vcalculate:
- [R] resistance
- [I] current
- why is fuse had to have lowmeltingpoint & high resistivity?
Asked by aninadathoorsridharan
5th July 2016
6:48 PM
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ICSE X Physics Calorimetry
What is kinetic moleculer theory.Define heat according to kinetic molecular theory
Asked by lovemaan5500
7th November 2017
5:42 PM
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ICSE X Physics Calorimetry
When boiling point increases with pressure food cooked in pressure cooker should take more time as its b.p. had increased and it will take more heat.
But why is it not happening
Asked by lovemaan5500
7th November 2017
5:50 PM
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ICSE X Physics Calorimetry
How does heat energy used for running trains and machines
Asked by lovemaan5500
26th November 2017
12:24 PM
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JEE Plances JEE (Main) Physics
water equivalent of heat in measured in? a) kg b) calorie c) kelvin D) m cube
Asked by futureisbright051101
15th January 2018
8:24 AM
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ICSE X Physics
an electrical immersion heater supplies 120J of heat energy per second. how long will it take to raise the temperature of 600g of water from 0C to its boiling point?
Asked by prdnya
19th February 2018
8:37 PM
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CBSE X Chemistry Acids, Bases and Salts
What is dead burnt plaster?
Asked by Saksham
4th March 2018
10:04 PM
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CBSE X Physics
1 calorie = ______ joules
Asked by abhijeet.mishra
14th March 2018
4:06 PM
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ICSE VIII Physics Energy
state the energy changes 1) an electric bulb 2)an electric motor
Asked by nathsantanukumar
11th April 2018
5:14 PM
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NEET1 NEET1 Chemistry
A system has internal energy equal to U1 600J of work is done on the system when 450 J of heat is lost. The final energy of system is_________________________. for this.. the formula is U=Q+W OR Q=U+W
Asked by imtiyazmulla68
2nd May 2018
7:49 PM
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CBSE XI Science Chemistry Thermodynamics
One mole of anhydrous MgCl2 dissolves in water and librates 25 cal/mol of heat. ∆Hhydration of MgCl2 = –30 cal/mol. Heat of dissolution of MgCl2.7H2O(s) is :- (1) +5 cal/mol (2) –5 cal/mol (3) 55 cal/mol (4) –55 cal/mol
Asked by Atulcaald
25th May 2018
12:24 AM
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CBSE XI Science Chemistry Thermodynamics
A system absorb 20 kJ heat and also does 10 kJ of work. The net internal energy of the system is :- (1) increases by 10 kJ (2) decreases by 10 kJ (3) increases by 30 kJ (4) decreases by 30 kJ
Asked by Atulcaald
25th May 2018
12:31 AM
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ICSE VIII Physics
The amount of heat absorbed by 1g of water while vapourising?
Asked by Spankinaishu
7th June 2018
8:28 PM
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CBSE IX Chemistry Matter in Our Surroundings
Why hot water freezes than cold water??
Asked by Anishkjainacus
3rd September 2018
8:07 AM
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NEET1 NEET1 Physics
Please answer the following question with explanation
Asked by Deepak
12th September 2018
10:07 PM
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CBSE VII Science Heat
when a person places the hand over a warm fire heat transfer takes place by the process of
Asked by sajal2402
8th October 2018
6:17 PM
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NEET1 NEET1 Physics
Please answer the following question with explanation
Asked by kkudgiri55
13th October 2018
12:10 PM
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NEET1 NEET1 Physics
Please answer the following question with explanation
Asked by kkudgiri55
17th October 2018
6:13 PM
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Maharashtra VII Science
Example of good conductor of heat with answer
Asked by Sadhanamandhare104
22nd October 2018
7:53 PM
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ICSE IX Physics Heat and Energy
How is it possible to heat water easily while cooking
Asked by dharansingh36
24th October 2018
4:56 PM
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CBSE X Chemistry Carbon and Its Compounds
Give two forms of energies liberated on burning of alcohol
Asked by jassii2443
2nd November 2018
6:35 PM
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ICSE XI Science Physics
Someone pls do this
Asked by pukai7229
2nd November 2018
11:00 PM
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ICSE IX Physics Heat and Energy
Dear Sir/madam, Required previous question papers about Propagation of Sound waves & Heat & energy
Asked by priya_padma1974
10th November 2018
11:33 AM
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ICSE X Physics
why is water sprayed on roads in the evenings during hot summer?
Asked by bharadwajlucky26
12th November 2018
2:58 PM
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JEE Plances JEE (Main) Chemistry
Sir, Pls solve this question.
Asked by rsudipto
8th December 2018
2:53 PM
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CBSE VII Science Heat
note the heat observed or evolved during the reaction by touching the dish
Asked by chavanamol4235
8th December 2018
7:19 PM
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CBSE VIII Science Combustion and Flame
Why a piece of wood does not catch fire when a lighted mathstick is brought near it
Asked by goel_kavya
18th February 2019
10:41 AM
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Maharashtra X Physics
Heat numerical
Asked by adipuri2004
19th February 2019
9:01 PM
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CBSE XI Science Physics Thermodynamics
On what factors does the amount of heat flowing through a body depend? Obtain the expression for the heat conducted.
Asked by hazim.mohaamad2003
2nd March 2019
12:10 PM
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ICSE VII Physics Heat
Define heat energy
Asked by Neerajkr615
19th March 2019
3:50 AM
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ICSE X Physics Calorimetry
200g of hot water of 80c is added to 300g of cold water at 10c .calculate final temperature of mixture of water (specific latent heat of water is 4200J/kg/c
Asked by Mallikarjunakj69
19th March 2019
8:41 AM
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NEET NEET Physics Thermodynamics
Why Q=0 is taken?
Asked by patra04011965
19th March 2019
1:17 PM
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CBSE VII Science
What is heat?write its types.
Asked by amitk8298
23rd March 2019
1:00 PM
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CBSE X Physics Electricity
derive the expression for heat produced due to current (I) flowing for time period (T) THROUGH RESISTOR (R) having potential difference (v) across the terminals 1) name the relation .list all the variables along with their SI units 2)how much heat will an instrument of 14W produce in half an hour if it is connected to a battery of 70 W?
Asked by ajayrath7
25th March 2019
7:54 PM
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Maharashtra VII Science
What is heat
Asked by singhomveer3344
27th March 2019
10:42 AM
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JEE Main Physics Current Electricity
When an electric heater is switched ON,the current flowing throug it is plotted against time(t).Taking into account the variation of resistance with temperature ,draw a graph plz
Asked by vishakhachandan026
29th March 2019
2:15 PM
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CBSE IX Chemistry Matter in Our Surroundings
Helo
Asked by jain.pradeep
2nd May 2019
11:54 PM
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CBSE XII Science Physics Dual Nature of Radiation and Matter
Hi tick the correct option in each case
Asked by jain.pradeep
26th May 2019
6:42 PM
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ICSE IX Physics
What is one important difference between the unit of heat and the unit of Temperature other than their names
Asked by Kamlesh
14th July 2019
8:04 AM
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CBSE VII Science Heat
What will happen if we put a 45 C iron rod in 45 C water
Asked by kiranpandey21985
24th July 2019
6:48 PM
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CBSE VII Science Heat
1.What is mean by heat?
Asked by Durgeshjaju456
10th August 2019
6:57 AM
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Maharashtra X Chemistry
what is the heat
Asked by arnavvispute6
17th August 2019
3:17 PM
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CBSE XII Science Physics
Please solve Q no 16
Asked by Nishantthakre95
15th September 2019
5:53 AM
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ICSE VIII Physics Energy
Name three devices/industries in which heat energy is out to some useful work
Asked by Shivamanidaffodils
15th September 2019
5:52 PM
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ICSE VIII Physics Kinetic Theory of Matter
How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
Asked by bhrarias1107
30th October 2019
8:38 PM
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ICSE VIII Physics Heat
The increase in the energy appears as heat of the body
Asked by Contactsangeetak
1st December 2019
7:22 PM
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CBSE X Physics
On which thing the metal dpands that it burn and give high amount of heat
Asked by aryanrawat882
28th December 2019
6:44 PM
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ICSE VII Physics Heat
define heat energy
Asked by Namankr33
3rd January 2020
7:03 PM
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CBSE VII Science Heat
how much heat is required to rise the temperature of 500 gram of Mercury from 20 degree Celsius to 100 degree Celsius scientific heat of mercury is equal to 0.0 33 kcal/(k g dot degree Celsius)
Asked by simajpande
4th January 2020
2:54 PM
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ICSE VII Physics Heat
Distinguish between reflection of heat and absorption of heat
Asked by nipavidi
6th January 2020
4:18 PM
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ICSE VII Physics Heat
name two quantities which are not regarded as matter
Asked by tiwarisantoshkumar906
10th April 2020
10:19 AM
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CBSE VII Science Heat
Why Black colour umbrella in summer compare to white one?
Asked by apramanik
24th April 2020
5:06 PM
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ICSE VII Physics Heat
How can light generate heat
Asked by jenilthakkar2372.7sdatl
29th April 2020
10:24 AM
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ICSE X Physics Work, Energy and Power
exercise 2b q 24
Asked by nilesh.dhote74
30th April 2020
5:05 PM
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ICSE X Science
exercise 8c numerical 18
Asked by nilesh.dhote74
13th May 2020
1:19 PM
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ICSE VII Physics
What is the meaning of heat energy
Asked by singhaditya1144.7sdatl
5th June 2020
8:55 AM
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CBSE IX Chemistry Matter in Our Surroundings
A ballon when kept in sun , bursts after some time . Why ? ans in points
Asked by swatipuspapatel
5th June 2020
12:52 PM
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ICSE VIII Chemistry Physical and Chemical Changes
fill in the blanks 1)Heat increases the temperature and in turns increases its______________________. 2)reactions that take place when exposed to light _______________________________ .
Asked by avadhutpandav82.8spicertl
15th June 2020
5:23 PM
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JEE Main Physics Electromagnetic Induction and Alternating Currents
⭕ plz tell me what is wattles current, Is it I =I(rms)sinø or, I = I°(nod)sinø
Asked by vidyavikram10
16th June 2020
8:49 PM
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ICSE X Physics Calorimetry
Is heat a conserved quantity? Give reason in suport of your answer?
Asked by abhinabasarkar.abhinaba
17th June 2020
9:24 PM
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ICSE X Physics
The base of a cooking pan is made thick why?
Asked by bennytom1969
17th July 2020
9:41 AM
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CBSE IX Physics
Please answer all question
Asked by trilokinath0522
17th July 2020
4:02 PM
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CBSE VII Science Heat
what is heat
Asked by yashvrdhanjaswal
5th August 2020
8:23 PM
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CBSE VII Science
What is conduction?
Asked by runeetkaur.1976
17th August 2020
3:03 PM
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ICSE IX Physics
If two bodies have same temperature but the amount of heat energy in both of them is different. Will there be a flow of heat energy between them if both bodies are placed in contact and will the temperature rise in any of the bodies?
Asked by anuprajgarhia
24th September 2020
12:22 PM
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CBSE VII Science Heat
Explain the process of conduction,convetion and radiation?
Asked by koyeliaghosh
30th September 2020
3:26 AM
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Maharashtra VII Science
What is heat
Asked by satishpthokale9999
6th October 2020
2:38 PM
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ICSE X Physics
Thus the quantity of heat energy absorbed to increase the temperature of a body depends on 3 factors. Can you please mention & explain the factors.
Asked by raksha.aps
22nd November 2020
4:17 PM
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CBSE X Physics Sources of Energy
The total amount of heat produced by a fuel having a calorific value of 20 kJ kg 1 was found to be 50,000 joules. How much fuel was burnt? 2500 kg 250 kg 25 kg 2.5 kg
Asked by bharanidharan12062007
22nd March 2021
2:27 PM
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ICSE VI Physics Work and Energy
Sir what is the good conducter of heat
Asked by rdso.maurya
25th April 2021
8:53 PM
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ICSE X Physics Work, Energy and Power
Name the physical quantity which is measured in calorie.How is it related to the si unit of that quantity
Asked by sanalakhotra74
15th May 2021
12:22 PM
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CBSE VII Science Heat
write difference between heat and temperature
Asked by nithiyashi2009
22nd May 2021
3:15 PM
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CBSE X Physics Sources of Energy
name the device to produce electricity from fossil fuels
Asked by priyankastudiokumta
4th July 2021
1:09 PM
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CBSE VII Science Heat
why black coloured umbrella is preffered in the hot sun
Asked by 502.ankitaroy
17th July 2021
7:11 AM
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NEET NEET Physics Electromagnetic Induction and Alternating Currents
Why I avg. (Current average) multiplied by Vavg (voltage average) and Time period does not give me heat loss in full cycle ? As I know I avg gives me dc component for ac ,I can take + I avg & -I avg for for +half cycle and -half cycle respectively,then net current will be zero in full cycle but both the current are responsible for heat production in ac so why can'take and do I avg ×v avg×T= Heat produced in ac current . (I know that vrms ×Irms×T will give me heat loss ) But my quetion it is why it is wrong which I had first . thank you
Asked by Jaydeepkalal2003
16th August 2021
9:32 PM
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CBSE VII Science Heat
when the pen is removed from fire it slowly cool down as
Asked by ds4061505
4th September 2021
10:40 AM
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ICSE VII Physics Heat
define heat
Asked by 12.7al.anandigupta
11th October 2021
3:54 PM
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CBSE VII Science Heat
.Harry has prepared hot sweet corn soup for himself and he has taken 2 utensils,out of which one is a small bowl 🥣 and other is a flat plate 🍽 and he poured 200ml soup in each utensil. In which case out of bowl and plate,soup will get cool sooner?Give reason for your answer.
Asked by mayurkhanna2580
11th December 2021
10:45 PM
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ICSE IX Physics Heat and Energy
what is heat write its si unit
Asked by lakshyarajsharma94
19th December 2021
12:37 PM
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ICSE VII Physics Heat
What is heat definition
Asked by kmgohil8222
12th January 2022
8:20 AM
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CBSE VII Science Heat
a change in temperature causes change in the ______________ of a substance
Asked by swethakrish10a.com
12th January 2022
8:13 PM
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ICSE VII Physics Heat
WHAT IS THE RELATION SHIP BETWEEN THE TERMS HEAT, HOT, COLD
Asked by swarnambarc82
6th February 2022
7:57 PM
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NEET NEET Physics Thermodynamics
Heat required to convert one gram of ice at 0 Celsius into steam at 100 Celsius
Asked by takshitashu46
9th February 2022
6:01 PM
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ICSE VII Physics Heat
what is biological change in heat
Asked by pradeep718
23rd February 2022
12:43 PM
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CBSE XI Science Physics Thermal Properties of Matter
why we fill hotter in two thin blankets than one thick blanket
Asked by parineetsandhu3232
11th March 2022
5:49 PM
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CBSE VII Science Heat
what is mean by heat
Asked by venneladarelli
12th April 2022
7:24 PM
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NEET NEET Physics Thermodynamics
physics
Asked by rc1927633
31st May 2022
11:41 AM
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CBSE VII Science Heat
if heat is energy and temperature is effect then what is fire? it is a source. but can we call it as a substance. What is fire made up of ?
Asked by sgpatil8772
1st June 2022
2:11 PM
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NEET NEET Physics Properties of Solids and Liquids
Calculate the rate of heat flow through the wall of a refrigerated van of 1.5 mm of steel sheet at outer surface, 100 mm plywood at the inner surface and 2 cm of glass-wool in between, if the temperatures of the inside and outside surfaces are 15°C and 24°C respectively. Take thermal conductivities of steel, glass-wool and plywood as 23.2 W/m°C, 0.014 W/m°C and 0.052 W/m°C respectively.
Asked by ogatheo2000
8th March 2023
8:59 PM
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JEE Main Physics Work, Energy and Power
A uniform rod of length L and mass M has been placed on a rough horizontal surface. The force F applied on the rod is such that the rod is such that the rod is just in the state of rest. If the coefficient of friction varies according to the relation μ=KX, where K is a positive constant. Suppose friction is present only from X=0 to X=L. If the rod moves in the direction of application of force then the total heat generated in the time in which the rod crosses this region, is equal to
Asked by fekishfaker
18th November 2023
1:39 PM
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ICSE VII Physics Heat
iron rims are heated before they are fixed on the wooden wheels explain
Asked by kalamng19
15th January 2024
7:51 PM
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CBSE X Science
Maharashtra State Board Exam Class 10 Physics (2024) The SI unit of heating is _____________ (A) Calorie (B) Joule (C) Kcal/kg ºC (D) Cal/g ºC
Asked by sagarmishra
18th March 2024
4:10 PM
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