How much work is done in forming a soap bubble of radius r?

Answer: the work done in blowing a soap bubble of radius r and surface tension is 8πr²T.

What is work done in forming a soap bubble?

The work done is given as the product of surface tension and change in surface area. … Surface area of the soap bubble, $ A = 4\pi {r^2} $ where $ r $ is the radius of the soap bubble. Volume of the soap bubble, $ V = \dfrac{4}{3}\pi {r^3} $ .

How much work is done in forming a soap bubble of radius R Shaalaa?

The work done in blowing a bubble of radius 2R of the same soap solution is 4W.

How much amount of work is?

Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.

What is the work done in blowing a soap bubble of radius 0.2 Metre?

4π×10−4J.

How much work done is required to form a bubble?

= 7.038 × 10–4 J.

How much amount of work is done in farming?

Globally, about 1 billion people* work in the agricultural sector, about 28% of the population employed in 2018.

What will be the work done in blowing?

What is the work done in blowing a soap bubble of radius r and surface tension S? =S×(4πr2)×2=8πSr2.

How much work must be done in blowing a soap bubble of radius 1cm of surface tension for soap solution is 25 dyne cm?

Surface tension of soap solution is 25 dyne/cm. (Ans : 15700 erg)

How does agriculture create employment?

Agriculture dependent jobs

With the demand for aggregation, storage, processing, logistics, food preparation, restaurants and other related services becoming increasingly important, many employment opportunities will emerge off the farm, in the larger agri-food systems.

What is farm work called?

A farmworker or agricultural worker is someone employed for labor in agriculture. … Agricultural work varies widely depending on context, degree of mechanization and crop.

What skills do you need to be a farm worker?

Agricultural workers should also possess the following specific qualities:
  • Dexterity. Agricultural workers need excellent hand-eye coordination to harvest crops and operate farm machinery.
  • Listening skills. Agricultural workers need to work well with others. …
  • Physical stamina. …
  • Physical strength. …
  • Mechanical skills.

How did agriculture sector help in creating jobs?

By stimulating growth of industries and widening employment opportunities, agriculture provides increased income outlets for various segments of the population. And increase in income leads to capital formation leading to the growth of non farm sector.

What is employment in agriculture?

Employment is defined as persons of working age who were engaged in any activity to produce goods or provide services for pay or profit, whether at work during the reference period or not at work due to temporary absence from a job, or to working-time arrangement.

Why agriculture job is important?

It’s crucial to a country’s development. Economic development is tied to a country’s agriculture sector. When trade, national revenue, and employment are combined in a positive way, a country enjoys reduced poverty and boosted economic growth.

How many workers are working in the primary sector?

In the primary sector, men account to about 43% and women account to about 62.8% of the workforce. The total percentage of workforce in the primary sector accounts to about 48.9%.