Question
A soap bubble expands isothermally and its radius
doubles. The work done by surface tension during this expansion is:Solution
When a soap bubble expands, work is done against surface tension to increase the surface area. A soap bubble has two surfaces (inner and outer), so total surface area is twice that of a single sphere. Let:
- Initial radius =
- Final radius = 2R
- Surface tension = T
Cation exchange capacity is found minimum in the case of:
With reference to the Government of India’s latest order to impose stock limits on pulses (2025–26), consider the following statements:
1....
Blue – green algae grow best in:
An Extension agent is considered to be a:
Which of the following is not communication process:
“Triple response”, a key reaction of ethylene, is characterized by:
Collateral fee loan limit for short term agri-credit has been raised from Rs. 1.00 lakh to Rs. ____lakh.
Which of the following plant hormone, plays a primary role in allowing K+ to pass rapidly out of guard cells, causing the stomata to close in response t...
Self-incompatibility does not exist in which mango variety
As per the Union Budget 2025-26, the budget allocation for the Ministry of Rural Development is approximately ____ .
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