Question

What are the examples of increasing and decreasing pressure? Explain what happens to the molecules and the object.

Answer 1

Answer:

4 example in which pressure increase with decrease in contact area.

1 A sharp knife cuts more effectively than a blunt knife as it has a very small surface area and exerts more pressure.

2 A nail has a pointed edge so that it exerts more thrust or pressure.

3 Tip of a sewing needle.

4 Edge of an arrow.

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

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Answer 2

• A sharp knife cuts more effectively than a blunt knife as it has a very small surface area and exerts more pressure.
• A nail has a pointed edge so that it exerts more thrust or pressure.
• Tip of a sewing needle.Edge of an arrow.
• Edges of tools used to pierce things.