Manju172

1. When a tin can is placed in cold water and compresses, it is likely due to a rapid decrease in internal pressure caused by the cooling of the air or steam inside the can. Here's a detailed explanation of this process: 2. This phenomenon can be demonstrated using a simple experiment with a soda can: 1. Heat a small amount of water in the soda can until it produces steam. 2. Quickly invert the can and place it into a bowl of cold water. 3. The can will crush as the steam condenses and the internal pressure drops.

This simple setup effectively demonstrates how changing mass distribution affects balance and motion, providing a tangible example of basic physics principles in action.

A lemon generally floats in salt water due to the increased density of the water. Salt water has a higher density than fresh water because of the dissolved salt, which makes it more buoyant. When placed in salt water, the lemon displaces a volume of water equal to its weight before it can sink. This buoyant force keeps the lemon afloat. In contrast, in fresh water, the lemon may sink because the water's lower density provides less buoyant force.