In the mid-nineteenth century, the English physicist James Joule created a device in which falling weights rotated paddles immersed in a barrel of water. Which of the following results did he observe?
W) The potential energy of the weights transferred entirely into kinetic energy to drive the paddles
X) The potential energy of the weights transferred entirely into elastic energy to drive the paddles
Y) The water in the barrel warmed slightly
Z) The water in the barrel cooled slightly
✔️Answer:Y) THE WATER IN THE BARREL WARMED SLIGHTLY
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