A block body t 227^o C radiates heat at the rate of 7 cal cm^-2 s^-1. At a temperature of 727^o C, the rate of heat radiated in the same units will be

60

50

112

80

Solution

112

Apply Stefan's law of radiation.
$straight E space equals σT to the power of 4 straight E subscript 1 over straight E subscript 2 space equals space open square brackets straight T subscript 1 over straight T subscript 2 close square brackets to the power of 4 straight E subscript 2 space equals space 7 space open square brackets fraction numerator 273 plus 727 over denominator 273 plus 227 end fraction close square brackets to the power of 4 space equals open parentheses 1000 over 500 close parentheses to the power of 4 space straight x space 7 equals space 112 space cal space cm to the power of negative 2 end exponent space straight s to the power of negative 1 end exponent$

Some More Questions From Mechanical Properties of Fluids Chapter

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Mechanical Properties Of Fluids

A block body t 227^o C radiates heat at the rate of 7 cal cm^-2 s^-1. At a temperature of 727^o C, the rate of heat radiated in the same units will be

60

50

112

80

Some More Questions From Mechanical Properties of Fluids Chapter

What is the condition for motion to be simple harmonic motion?

In the displacement equation y = r sin(ωt/ + ϕ) what does ϕ called and what information does it give?

What determines the natural frequency of an oscillator?

Is there any relation between uniform circular motion and simple harmonic motion?

What is periodic motion?

Write down the expression for the instantaneous velocity and acceleration of particle vibrating in simple harmonic motion.

How do you define the mean position of particle executing simple harmonic motion?

Define amplitude.

What is the net displacement of the particle executing simple harmonic motion in one complete oscillation?

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Mechanical Properties Of Fluids

A block body t 227o C radiates heat at the rate of 7 cal cm-2 s-1. At a temperature of 727o C, the rate of heat radiated in the same units will be 60 50 112 80

Some More Questions From Mechanical Properties of Fluids Chapter

What is the condition for motion to be simple harmonic motion?

In the displacement equation y = r sin(ωt/ + ϕ) what does ϕ called and what information does it give?

What determines the natural frequency of an oscillator?

Is there any relation between uniform circular motion and simple harmonic motion?

What is periodic motion?

Write down the expression for the instantaneous velocity and acceleration of particle vibrating in simple harmonic motion.

How do you define the mean position of particle executing simple harmonic motion?

Define amplitude.

What is the net displacement of the particle executing simple harmonic motion in one complete oscillation?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

A block body t 227^o C radiates heat at the rate of 7 cal cm^-2 s^-1. At a temperature of 727^o C, the rate of heat radiated in the same units will be

60

50

112

80