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High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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  1.  
    2. We have actually found the rise in temperature of water at the bottom of the fall *per second* right?
    1 years ago by

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  2.  
    3. We have actually calculated the rise in temperature of water in 1s right?
    1 years ago by

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  3.  
    4. SIR , WELL while taking work done by frictional force, why dont we take work done by gravitational force. cant we do it by energy conservation , that is change in PE=msdT
    3 years ago by

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  4.  
    5. sir what is the need to consider the water to freeze.There is a chance that it may not even reach the ) degrees celcius mark
    4 years ago by Kartik Parameshwaran

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  5.  
    6. sir how heat is directly proportional to mass of a body
    5 years ago by Srisurya

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  6.  
    7. Why potential energy not considered.
    6 years ago by sameer utradhi

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  7.  
    8. 10 g of ice at -20 deg C is added to 10 g of water at 50 deg C. Then the resulting temperature is (Specific heat of ice = 0.5 cal/g degC and latent heat of ice = 80 cal/g).
    7 years ago by Ashok Kumar

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  8.  
    9. can we calculate P.E = 1000J by mgh=2*10*50=1000
    7 years ago by jaskarn singh

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  9.  
    10. best book to use for heat and termo????
    8 years ago by Anil Sharma
    Ans 1 ->
    pysics galaxy ashish arora
    4 years ago by

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  10.  
    11. Sir in the above problem can u plz tell how we got 10 to the power three
    8 years ago by Shreeansh Gupta
    Ans 1 ->
    1Kcal=1000cal
    7 years ago by jaskarn singh

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  11.  
    12. Sir why did you consider work done by friction only and didn't consider other energies ?
    8 years ago by TABETI BHANUPRAKASH GOUD
    Ans 1 ->
    other forces such as gravity are conservative and work done by them increases the kinetic energy of the body only it does not affect the theremal energy.
    8 years ago by Ajay Sabarish

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  12.  
    13. Sir but James Prescott Joule lived from 1818-1889. So how can he establish a relation for heat and work in 1943 ??
    8 years ago by ayush kumar tripathi
    Ans 1 ->
    Does it really matter? :/
    7 years ago by Vin Diesel
    Ans 2 ->
    it is 1843
    6 years ago by Yash Sharma

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  13.  
    14. Sir,how did you take the temperature of that particular mixture as 0 c(zero degree centigrade)
    9 years ago by R Yashwanth
    Ans 1 ->
    for ice to exist it should be 0 c common sense
    9 years ago by akanksh
    Ans 2 ->
    In situation we are taking all content of mixture at 0 deg with all available heat aside which then be supplied to get the final composition of mixture and final temp.
    9 years ago by Physics Galaxy

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  14.  
    15. sir, in the example 2 of calorimetry u have said that when block slides with uniform speed acceleartion is zero. but if f=mgsin@ the two forces are balanced then how will the block move?
    9 years ago by Gagan
    Ans 1 ->
    When the block is started due to some impulse, it attains some speed and as both forces are balanced it moves on at uniform speed but yes to start the motion some initial impulse would have been used...
    9 years ago by Physics Galaxy

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  15.  
    16. what is Calorimetry?
    9 years ago by Arushi Agrawal
    Ans 1 ->
    It is the study of effects of heat exchanges between substances or between surrounding...To understand in detail pl watch all videos of topic 'calorimetry' under section 'Heat and Thermodynamics' in tab 'PG video lectures'
    9 years ago by Physics Galaxy
    Ans 2 ->
    Calorimetry is the science or act of measuring changes in state variables of a body for the purpose of deriving the heat transfer associated with changes of its state due for example to chemical reactions, physical changes, or phase transitions under specified constraints. To understand in detail pl watch all videos of topic 'calorimetry' under section 'Heat and Thermodynamics' in tab 'PG video lectures'
    9 years ago by Ninad Akolekar

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  16.  
    17. DIFFERENT BETWEEN SPECIFIC HEAT AND SPECIFIC HEAT CAPACITY
    10 years ago by niteesh kumar
    Ans 1 ->
    'specific' term is used to define the physical quantity per unit mass....in general.... so both of above terms have same meaning...
    9 years ago by Physics Galaxy

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