Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
The cold air that blows from the land towards the sea during the night, is called a land breeze The cold air that blows from the sea towards the land during the day is known as the sea breeze. These breezes are examples of a natural convection current.
Natural convection currents
APPEARS IN
संबंधित प्रश्न
Consider the situation of the previous problem. Assume that the temperature of the water at the bottom of the lake remains constant at 4°C as the ice forms on the surface (the heat required to maintain the temperature of the bottom layer may come from the bed of the lake). The depth of the lake is 1.0 m. Show that the thickness of the ice formed attains a steady state maximum value. Find this value. The thermal conductivity of water = 0.50 W m−1°C−1. Take other relevant data from the previous problem.
Explain why do vegetables and fruits get damaged during severe frost?
A deep pond of water has its top layer frozen. What will be the likely temperature of water layer at the bottom of the pond?
What are land and sea breezes? Explain with the help of a labeled diagram.
Observe the given graph and answer the following questions:
- Name the process represented in the figure.
- At what temperature does this process take place?
When the temperature of water decreases below 4 °C it’s volume _______.
In a region with a cold climate the aquatic animals can survive at 4 °C, because _______.
In cold regions, in winter the pipes for water supply break.
Observe the following diagram and write the answers to the questions given below.
- Which process does the graph represent?
- What is the range of temperature responsible for the behaviour?
A graph between the volume and temperature of water is shown. Explain the anomalous behaviour of water.
