Suresh has two half-filled buckets of water when he wants to take bath. The temperature of the water in one bucket is 25° C (room temperature) and the temperature of water in other bucket is 60° C. He has two plans in his mind before taking bath: Plan 1: He mixes both the waters in a bucket and wait 20 minutes before taking bath. Plan 2: First, he waits for 20 minutes and mixes the water just before the bath. He is confused about which plan will work to get him hotter water. Help him find the correct plan.

What is the mass of a material, whose specific heat capacity is 400 J/(kg °C) for a rise in temperature from 15°C to 25°C, when heat received is 20 kJ?

On a day when I am in hurry to go to office, I have a fixed quantity of rice which was just cooked and kept in a bowl. In order to cool it quickly, which one of the following is the best option?

Which one among the following statements with reference to the properties of water is not correct ?

If a gas is compressed to half of its original volume at 27°C, to what temperature should it be heated to make it occupy its original volume?

Statement: A black body is an ideal absorber and emitter of radiation. Conclusion I: Radiation is not reflected from a black body. Conclusion II: A black body emits more energy at high temperature. C…