Pressure is the force applied perpendicular to a surface divided by the area of that surface. It explains why sharp objects pierce more easily, why hy
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Why does a balloon burst at high altitude?
At high altitude, atmospheric pressure decreases. The pressure inside the balloon remains relatively constant. The pressure difference pushes outward harder, stretching the balloon until it bursts.
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How does a straw allow drinking without using muscle power to pull water up?
When you reduce mouth pressure by inhaling, atmospheric pressure outside the glass pushes the water up the straw to equalize pressure. It is not the mouth pulling the water but atmospheric pressure pushing it.
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Why are water droplets spherical in space with no gravity?
Gravity does not determine shape; surface tension does. Water molecules are attracted to each other and form the shape with minimum surface area, which is a sphere. In space or free fall, spheres form naturally.
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