Consider the following statements:
1. The ideal conditions for the formation of dew are clear sky, calm air, high relative humidity, and cold and long nights.
2. The ideal conditions for the formation of frost are completely the same as those for the formation of dew.
Which of the statements given above is/are correct?
1 only
2 only
Both 1 and 2
Neither 1 nor 2
Dew
When moisture is deposited in the form of water droplets on cooler surfaces of solid objects (rather than nuclei in the air above the surface), such as stones, grass blades and plant leaves, it is known as dew. The ideal conditions for its formation are clear sky, calm air, high relative humidity, and cold and long nights. For the formation of dew, it is necessary that the dew point is above the freezing point.
Frost
Frost forms on cold surfaces, when condensation takes place below freezing point (0°C), i.e., the dew point is at or below the freezing point. The excess moisture is deposited in the form of minute ice crystals, instead of water droplets. The ideal conditions for the formation of white frost are the same as those for the formation of dew, except that the air temperature must be at or below the freezing point.
Nine litres are drawn from a cask full of water and it is then filled with milk, Nine litres of mixture are drawn and the cask is again filled with milk, The quantity of water now left in the cask to that of the milk in it is 16 : 9. How much does the cask hold?
Science & Technology · Easy
Sustainable development requires which of the following? 1. Preservation of ecological resources and greater use of renewable resources. 2. Encouragement to the use of environmentally-safe technologies for development purposes. 3. Formulation and implementation of policy framework for people-security and human justice, including ecological and economic security. Select the correct answer using the code given below:
Science & Technology · Easy
Consider the following statements about the Cabinet Mission: 1. Stafford Cripps was the Chairman of the Mission. 2. It supported the cause of Pakistan’s independence. 3. It recommended that provinces will have residuary powers. Which of the statements given above is/are not correct?
Science & Technology · Easy
The identity platform 'Aadhaar' provides open "Application Programming Interfaces (APIs)". What does it imply ? 1. It can be integrated into any electronic device. 2. Online authentication using iris is possible. Which of the statements given above is/ are correct ?
Science & Technology · Easy