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A black body is heated from 27°C to 127°C. The ratio of their energies of radiations emitted will be
We will use the Stefan-Boltzmann law, which states that the energy radiated by a black body is proportional to the fourth power of its temperature in Kelvin: E ∝ T⁴ Given: - Initial temperature T₁ = 27°C = 27 + 273 = 300 K - Final temperature T₂ = 127°C = 127 + 273 = 400 K The ratio of energies radiRead more
We will use the Stefan-Boltzmann law, which states that the energy radiated by a black body is proportional to the fourth power of its temperature in Kelvin:
E ∝ T⁴
Given:
– Initial temperature T₁ = 27°C = 27 + 273 = 300 K
– Final temperature T₂ = 127°C = 127 + 273 = 400 K
The ratio of energies radiated:
E₂ / E₁ = (T₂ / T₁)⁴
Now calculate the ratio:
E₂ / E₁ = (400 / 300)⁴ ≈ 3.16
Hence, the nearest answer is: 3 : 4
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What food scraps can be fed to the earthworms and which materials should be avoided?
Earthworms thrive on fruit and vegetable peelings, coffee grounds, eggshells, and non-greasy food scraps. These provide essential nutrients for decomposition. However, avoid adding meat, dairy, oily foods, and citrus fruits to the bin, as they can harm the worms or attract pests. Proper selection ofRead more
Earthworms thrive on fruit and vegetable peelings, coffee grounds, eggshells, and non-greasy food scraps. These provide essential nutrients for decomposition. However, avoid adding meat, dairy, oily foods, and citrus fruits to the bin, as they can harm the worms or attract pests. Proper selection of feeding materials ensures a healthy environment for the worms and prevents any disruptions in the composting process.
See lessWhat type of earthworms are commonly used for vermicomposting and where can they be sourced?
The most suitable earthworms for vermicomposting are red earthworms, scientifically known as Eisenia fetida. These worms are highly efficient in breaking down organic waste into nutrient-rich compost. They can be sourced from local farms, nurseries, or suppliers specializing in composting materials.Read more
The most suitable earthworms for vermicomposting are red earthworms, scientifically known as Eisenia fetida. These worms are highly efficient in breaking down organic waste into nutrient-rich compost. They can be sourced from local farms, nurseries, or suppliers specializing in composting materials. Their presence is crucial for speeding up the decomposition process and improving the quality of the resulting vermicompost.
See lessIf 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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How can you harvest produce in a kitchen garden?
To harvest produce, wait until vegetables or fruits reach their optimal size or ripeness. Use clean, sharp tools such as scissors or knives to cut them without damaging the plant. Harvest in the morning when the produce is fresh and avoid pulling or twisting to prevent harm. Collect ripe items regulRead more
To harvest produce, wait until vegetables or fruits reach their optimal size or ripeness. Use clean, sharp tools such as scissors or knives to cut them without damaging the plant. Harvest in the morning when the produce is fresh and avoid pulling or twisting to prevent harm. Collect ripe items regularly to encourage continuous growth. Proper handling ensures better quality and freshness while maintaining the health of the plants for future yields.
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