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संबंधित प्रश्न
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.
A 50 kg man is running at a speed of 18 km h−1. If all the kinetic energy of the man can be used to increase the temperature of water from 20°C to 30°C, how much water can be heated with this energy?
Explain the following
A hollow glass sphere which floats with its entire volume submerged in water at 4°C, sinks when water is heated above 4°C.
Water is cooled from 4 °C to 0 °C. It will :
A deep pond of water has its top layer frozen. What will be the likely temperature of water layer just in contact with ice?
What are hot spots? How can you extract energy from a hot spot, if it does not come in contact with underground water?
