Two identical blocks of iron are heated till they glow red in the fire. The two blocks are then dipped at the same time into two identical jars P and Q containing the same amount of water. The water in jar P is warm tap water, while the water in jar Q is cold water from the refrigerator. Which of the following is likely to happen?
A - Only the Block dipped in jar Q will cool down
B - Only the block dipped in Jar P will heat up
C - Both the blocks will cool down
D - Both the blocks will heat up
A - Only the Block dipped in jar Q will cool down
B - Only the block dipped in Jar P will heat up
C - Both the blocks will cool down
D - Both the blocks will heat up
Dear Student,
Answer to your question is given below:
For iron to be heated till they glow red in the fire, the temperature should be nearly 460o C. For warm tap water, its temperature is 100o C or less and for cold water from refrigerator, its temperature is 0o C. Hence in both the cases, both blocks will cool down.
Hence option (C) is the correct choice.
Regards,