Share & grow the world's knowledge!
We want to connect the people who have knowledge to the people who need it, to bring together people with different perspectives so they can understand each other better, and to empower everyone to share their knowledge.
How can farm seeds from a previous harvest be used for sowing?
Farm seeds preserved from a previous harvest are a cost-effective and sustainable choice for sowing. Seek guidance from farmers or gardeners to understand the appropriate planting depth, spacing, and care for these seeds. These seeds are often acclimated to local growing conditions, increasing theirRead more
Farm seeds preserved from a previous harvest are a cost-effective and sustainable choice for sowing. Seek guidance from farmers or gardeners to understand the appropriate planting depth, spacing, and care for these seeds. These seeds are often acclimated to local growing conditions, increasing their chances of germination and healthy growth. Using such seeds also supports traditional agricultural practices and promotes biodiversity in the kitchen garden.
See lessSuppose the sun expands so that its radius becomes 100 times its present radius and its surface temperature becomes half of its present value. The total energy emitted by it then will increases by a factor of
We use the Stefan-Boltzmann law to calculate the total energy emitted by the Sun after it expands: P = σ A T⁴ where: - P is the power (total energy emitted per unit time), - σ is the Stefan-Boltzmann constant, - A is the surface area of the Sun (which is proportional to the square of the radius), -Read more
We use the Stefan-Boltzmann law to calculate the total energy emitted by the Sun after it expands:
P = σ A T⁴
where:
– P is the power (total energy emitted per unit time),
– σ is the Stefan-Boltzmann constant,
– A is the surface area of the Sun (which is proportional to the square of the radius),
– T is the temperature of the Sun.
### Changes
– The radius of the Sun increases to 100 times its original radius. Thus surface area A increases by a factor of 100² = 10,000.
– The temperature of the Sun becomes half. Therefore T reduces by a factor of 2. Since the total energy emitted is proportional to T⁴, the power reduces by a factor of 2⁴ = 16.
Total change in energy:
The total energy emitted is proportional to the surface area and the fourth power of the temperature. Thus, the total energy emitted will change by:
Change in energy = (Aₙₑʷ * Tₙₑʷ⁴) / (Aₒˡᵈ * Tₒˡᵈ⁴) = (100² * (1/2)⁴) / 1 = (10,000 * 1) / 16 = 625
Thus, the total energy emitted will increase by a factor of 625.
So, the correct answer is: 625
Click here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-10/
Why is it important to follow the recommended planting depth and spacing for seeds?
Following the recommended planting depth ensures seeds are neither too deep nor too shallow, providing them with the right balance of moisture and light for germination. Spacing is equally essential to avoid overcrowding, allowing each plant enough room for root growth and access to essential resourRead more
Following the recommended planting depth ensures seeds are neither too deep nor too shallow, providing them with the right balance of moisture and light for germination. Spacing is equally essential to avoid overcrowding, allowing each plant enough room for root growth and access to essential resources like nutrients, water, and sunlight. Proper depth and spacing ultimately enhance the overall health and productivity of the plants in the kitchen garden.
See lessWhat instructions should you read on the seed packets before planting seeds?
Before planting seeds, check the instructions on the seed packets for the recommended planting depth, spacing, and the ideal planting season. This information is crucial for ensuring seeds are placed correctly in the soil to promote proper germination and healthy growth. Following these guidelines hRead more
Before planting seeds, check the instructions on the seed packets for the recommended planting depth, spacing, and the ideal planting season. This information is crucial for ensuring seeds are placed correctly in the soil to promote proper germination and healthy growth. Following these guidelines helps in optimizing the use of space, avoiding overcrowding, and creating an environment suitable for plants to thrive in your kitchen garden.
See lessDid you use organic manure? If yes, what proportion did you use for mixing organic manure with soil?
Yes, organic manure was used to enrich the soil. It was mixed with the soil in a proportion of 1:3 (one part manure to three parts soil). This ensured an optimal balance of nutrients for plants while maintaining soil structure. The organic manure enhanced soil fertility, improved aeration and waterRead more
Yes, organic manure was used to enrich the soil. It was mixed with the soil in a proportion of 1:3 (one part manure to three parts soil). This ensured an optimal balance of nutrients for plants while maintaining soil structure. The organic manure enhanced soil fertility, improved aeration and water retention, and provided essential nutrients like nitrogen and phosphorus, supporting healthy germination and robust growth of plants in the kitchen garden.
See less