General
Easy
Physics

t is the units of emissive power in Stefan’s law ?

PhysicsGeneral

  1. Ws to the power of negative 1 space end exponent m to the power of negative 2 end exponent
  2. W
  3. W m to the power of negative 2 end exponent
  4. W s to the power of negative 1 end exponent

    Answer:The correct answer is: W m to the power of negative 2 end exponent

    Book A Free Demo

    +91

    Grade*

    Related Questions to study

    General
    physics

    A body cools in 5 minute from 60 to the power of 0 C to 40 to the power of 0 C . The termperature of the surroundings is 10 to the power of 0 C . What is its temperature after the next 5 minute?

    A body cools in 5 minute from 60 to the power of 0 C to 40 to the power of 0 C . The termperature of the surroundings is 10 to the power of 0 C . What is its temperature after the next 5 minute?

    physicsGeneral
    General
    physics

    Two spheres of the same material have radii  1 m and 4m and temperatures 2000k and 4000k respectively. If the energy radiated by the spheres are  E subscript 1 space a n d space E subscript 2  respectively then find ratio ofE subscript 1 over E subscript 2

    Two spheres of the same material have radii  1 m and 4m and temperatures 2000k and 4000k respectively. If the energy radiated by the spheres are  E subscript 1 space a n d space E subscript 2  respectively then find ratio ofE subscript 1 over E subscript 2

    physicsGeneral
    General
    physics

    A liquid takes 5 minute to cool from 80 to the power of 0 C  to  50 to the power of 0 C. The temperature of the surrounding is 20 to the power of 0 C. What is the time it will take to cool from  60 to the power of 0 C space t o space 30 to the power of 0 c  ?

    A liquid takes 5 minute to cool from 80 to the power of 0 C  to  50 to the power of 0 C. The temperature of the surrounding is 20 to the power of 0 C. What is the time it will take to cool from  60 to the power of 0 C space t o space 30 to the power of 0 c  ?

    physicsGeneral
    General
    physics

    A bubble of air 2 mm in diameter rises in a liquid of viscosity 0.075 SI units and density ,1350 kgm to the power of negative 3 end exponent . The terminal velocity of the bubble is about..........,m/s

    A bubble of air 2 mm in diameter rises in a liquid of viscosity 0.075 SI units and density ,1350 kgm to the power of negative 3 end exponent . The terminal velocity of the bubble is about..........,m/s

    physicsGeneral
    General
    physics

    The terminal velocity of fall of lead shots in the cylindrical vessel is influenced by the nearness of the walls of the vessel. Hence the velocity in formula is divided by a factor open parentheses 1 plus fraction numerator 2.4 r over denominator R end fraction close parentheses . Where r is the radius of the lead shots and  the radius of the vessel. This is called

    The terminal velocity of fall of lead shots in the cylindrical vessel is influenced by the nearness of the walls of the vessel. Hence the velocity in formula is divided by a factor open parentheses 1 plus fraction numerator 2.4 r over denominator R end fraction close parentheses . Where r is the radius of the lead shots and  the radius of the vessel. This is called

    physicsGeneral
    General
    chemistry-

    Which of the following can adsorb largest volume of hydrogen gas

    Order of adsorption of H subscript 2 end subscript (occlusion) is
    Colloidal Palladium > Palladium > Platinum > Gold > Nickel

    Which of the following can adsorb largest volume of hydrogen gas

    chemistry-General
    Order of adsorption of H subscript 2 end subscript (occlusion) is
    Colloidal Palladium > Palladium > Platinum > Gold > Nickel
    General
    chemistry-

    Hydrogen from HCl can be prepared by

    Hydrogen from HCl can be prepared by

    chemistry-General
    General
    chemistry-

    Action of water or dilute mineral acids on metals can give

    Action of water or dilute mineral acids on metals can give

    chemistry-General
    General
    chemistry-

    Ortho and para hydrogen differ in

    Ortho and para hydrogen differ in proton spin.

    Ortho and para hydrogen differ in

    chemistry-General
    Ortho and para hydrogen differ in proton spin.
    General
    chemistry-

    Hydrogen resembles in many of its properties

    Hydrogen resembles in many of its properties

    chemistry-General
    General
    chemistry-

    Which of the following reaction produces hydrogen

    M g plus 2 H subscript 2 end subscript O rightwards arrow M g left parenthesis O H right parenthesis subscript 2 end subscript plus H subscript 2 end subscript upwards arrow

    Which of the following reaction produces hydrogen

    chemistry-General
    M g plus 2 H subscript 2 end subscript O rightwards arrow M g left parenthesis O H right parenthesis subscript 2 end subscript plus H subscript 2 end subscript upwards arrow
    General
    chemistry-

    Among the following, identify the compound which cannot act as both oxidising and reducing agents

    Among the following, identify the compound which cannot act as both oxidising and reducing agents

    chemistry-General
    General
    chemistry-

    On reaction with Mg, very dilute nitric acid produces

    On reaction with Mg, very dilute nitric acid produces

    chemistry-General
    General
    chemistry-

    Which is distilled first

    Boiling point of liquid hydrogen is lowest of given substances so it is distilled first.

    Which is distilled first

    chemistry-General
    Boiling point of liquid hydrogen is lowest of given substances so it is distilled first.
    General
    chemistry-

    Which pair does not show hydrogen isotopes

    Ortho and para hydrogen show different spin in a hydrogen molecule it does not show hydrogen isotopes.

    Which pair does not show hydrogen isotopes

    chemistry-General
    Ortho and para hydrogen show different spin in a hydrogen molecule it does not show hydrogen isotopes.