The Stefan-Boltzmann law can be used to calculate the rate of increase in energy radiation due to an increase in the temperature of a black body. This law states that the rate of energy radiation is proportional to the fourth power of the temperature: E ∝ T⁴ Given: - Initial temperature T₁ = 7°C = 7Read more
The Stefan-Boltzmann law can be used to calculate the rate of increase in energy radiation due to an increase in the temperature of a black body. This law states that the rate of energy radiation is proportional to the fourth power of the temperature:
E ∝ T⁴
Given:
– Initial temperature T₁ = 7°C = 7 + 273 = 280 K
– Final temperature T₂ = 287°C = 287 + 273 = 560 K
Ratio of the energies radiated:
E₂ / E₁ = (T₂ / T₁)⁴
Now calculating the ratio:
E₂ / E₁ = (560 / 280)⁴ = 16
Therefore, the rate of energy radiation increases by a factor of: 16
Specific heat is the quantity of heat necessary to raise the temperature of 1 unit mass of a substance by 1°C or 1 K. Molar specific heat is the quantity of heat necessary to raise the temperature of 1 mole of a substance by 1°C or 1 K. CGS units: - Specific heat: cal/g°C - Molar specific heat: cal/Read more
Specific heat is the quantity of heat necessary to raise the temperature of 1 unit mass of a substance by 1°C or 1 K.
Molar specific heat is the quantity of heat necessary to raise the temperature of 1 mole of a substance by 1°C or 1 K.
CGS units:
– Specific heat: cal/g°C
– Molar specific heat: cal/mol°C
SI units:
– Specific heat: J/kg·K
– Molar specific heat: J/mol·K
The coefficient of apparent expansion of a liquid is the increase in volume per unit volume of the liquid when heated, as measured by a container. It takes into account both the expansion of the liquid and the container. The coefficient of real expansion of a liquid is the actual increase in volumeRead more
The coefficient of apparent expansion of a liquid is the increase in volume per unit volume of the liquid when heated, as measured by a container. It takes into account both the expansion of the liquid and the container.
The coefficient of real expansion of a liquid is the actual increase in volume per unit volume of the liquid, ignoring the effects of the container.
The relation between the two is given as:
Real expansion = Apparent expansion + Coefficient of linear expansion of the container × Coefficient of volume expansion of the container
According to Hooke's Law, an applied force directly stretches a spring and is defined by the formula given below. F = kx Here: - F refers to the force applied - k refers to the spring constant - x refers to the extension of the spring. When the mass M is hung on the spring, the force applied is F1 =Read more
According to Hooke’s Law, an applied force directly stretches a spring and is defined by the formula given below.
F = kx
Here:
– F refers to the force applied
– k refers to the spring constant
– x refers to the extension of the spring.
When the mass M is hung on the spring, the force applied is F1 = Mg where g is acceleration due to gravity and the extension is x1 = 1 cm.
Now, if the mass is doubled to 2M then the force applied will be F2 = 2Mg, and the extension will be x2.
By using the proportionality between force and extension:
The quantity that has no dimensions is: strain Strain is defined as the ratio of change in length to the original length, so it is a dimensionless quantity. The other quantities like angular velocity, momentum, and angular momentum have dimensions. Click for more: https://www.tiwariacademy.com/ncertRead more
The quantity that has no dimensions is: strain
Strain is defined as the ratio of change in length to the original length, so it is a dimensionless quantity.
The other quantities like angular velocity, momentum, and angular momentum have dimensions.
If temperature of a black body increases from 7°C to 287°C, then the rate of energy radiation increases by
The Stefan-Boltzmann law can be used to calculate the rate of increase in energy radiation due to an increase in the temperature of a black body. This law states that the rate of energy radiation is proportional to the fourth power of the temperature: E ∝ T⁴ Given: - Initial temperature T₁ = 7°C = 7Read more
The Stefan-Boltzmann law can be used to calculate the rate of increase in energy radiation due to an increase in the temperature of a black body. This law states that the rate of energy radiation is proportional to the fourth power of the temperature:
E ∝ T⁴
Given:
– Initial temperature T₁ = 7°C = 7 + 273 = 280 K
– Final temperature T₂ = 287°C = 287 + 273 = 560 K
Ratio of the energies radiated:
E₂ / E₁ = (T₂ / T₁)⁴
Now calculating the ratio:
E₂ / E₁ = (560 / 280)⁴ = 16
Therefore, the rate of energy radiation increases by a factor of: 16
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Define the terms specific heat and molar specific heat. Give their CGS and SI units.
Specific heat is the quantity of heat necessary to raise the temperature of 1 unit mass of a substance by 1°C or 1 K. Molar specific heat is the quantity of heat necessary to raise the temperature of 1 mole of a substance by 1°C or 1 K. CGS units: - Specific heat: cal/g°C - Molar specific heat: cal/Read more
Specific heat is the quantity of heat necessary to raise the temperature of 1 unit mass of a substance by 1°C or 1 K.
Molar specific heat is the quantity of heat necessary to raise the temperature of 1 mole of a substance by 1°C or 1 K.
CGS units:
– Specific heat: cal/g°C
– Molar specific heat: cal/mol°C
SI units:
– Specific heat: J/kg·K
– Molar specific heat: J/mol·K
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See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-10/
What do you mean by coefficients of apparent and real expansion of a liquid ? How are they related?
The coefficient of apparent expansion of a liquid is the increase in volume per unit volume of the liquid when heated, as measured by a container. It takes into account both the expansion of the liquid and the container. The coefficient of real expansion of a liquid is the actual increase in volumeRead more
The coefficient of apparent expansion of a liquid is the increase in volume per unit volume of the liquid when heated, as measured by a container. It takes into account both the expansion of the liquid and the container.
The coefficient of real expansion of a liquid is the actual increase in volume per unit volume of the liquid, ignoring the effects of the container.
The relation between the two is given as:
Real expansion = Apparent expansion + Coefficient of linear expansion of the container × Coefficient of volume expansion of the container
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When a body of mass M is hung from a spring, the spring extends by 1 cm. If the body of mass 2 M be hung from the same spring, the extension of spring will be
According to Hooke's Law, an applied force directly stretches a spring and is defined by the formula given below. F = kx Here: - F refers to the force applied - k refers to the spring constant - x refers to the extension of the spring. When the mass M is hung on the spring, the force applied is F1 =Read more
According to Hooke’s Law, an applied force directly stretches a spring and is defined by the formula given below.
F = kx
Here:
– F refers to the force applied
– k refers to the spring constant
– x refers to the extension of the spring.
When the mass M is hung on the spring, the force applied is F1 = Mg where g is acceleration due to gravity and the extension is x1 = 1 cm.
Now, if the mass is doubled to 2M then the force applied will be F2 = 2Mg, and the extension will be x2.
By using the proportionality between force and extension:
x2 / x1 = F2 / F1
x2 / 1 cm = 2Mg / Mg = 2
Therefore, the extension x2 = 2 cm.
The correct answer is: 2 cm
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Which of the following has no dimensions?
The quantity that has no dimensions is: strain Strain is defined as the ratio of change in length to the original length, so it is a dimensionless quantity. The other quantities like angular velocity, momentum, and angular momentum have dimensions. Click for more: https://www.tiwariacademy.com/ncertRead more
The quantity that has no dimensions is: strain
Strain is defined as the ratio of change in length to the original length, so it is a dimensionless quantity.
The other quantities like angular velocity, momentum, and angular momentum have dimensions.
Click for more:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-8/