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प्रश्न
उत्तर
Lower fixed point = 10°C
Upper fixed point =130°C
Range of thermometer= 130°C - 10°C
= 120°C
No of divisions = 100
So least count = 120/100 = 1.2°C
On actual thermometer 40°C would have 40 divisions
So, on this thermometer, it would show
= 40 x LC = 48°C
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संबंधित प्रश्न
Water is used as a cooling agent.
Explain the following:
What is the role of the anomalous behaviour of water in preserving aquatic life in regions of cold climate?
Calculate the time required to heat 20 kg of water from 10°C to 35°C using an immersion heater rated 1000 W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000 J kg−1 K−1.
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.
What will be the approximate temperature of water in the lake shown in the following diagram?
(i) At X, and
(ii) At Y?
Write the name.
The instrument used to study anomalous behaviour of water.
Draw a neat and labelled diagram of Hope’s apparatus.
