How Does a Balloon Float in Air?
What causes a balloon to float in air?
a) Air particles are repelled by the balloon's surface.
b) Air particles are attracted to the balloon's surface.
c) Air particles are accelerated downward by gravity.
d) Air particles are pushed downward by air pressure.
Final answer: The microscopic cause of the downward force exerted on air by a balloon is due to the constant effect of gravity on air particles. This creates a buoyant force that allows the balloon to float.
Explanation
Among the options presented to describe the microscopic cause of the downward force exerted on air by a balloon, the most accurate is c) Air particles are accelerated downward by gravity. Air particles are under the constant effect of gravity, which pulls them downwards. This downward motion of air particles exerts a pressure on the air beneath the balloon, causing an upward buoyant force that lets the balloon float. The reason behind this is the principle of buoyancy, which states that the upward force on the bottom of an object in a fluid is greater than the downward force on top of the object. When a balloon is in air, although weight is pulling it downwards, the air underneath it provides an upward force namely buoyant force which opposes this weight. Hence, the balloon floats in air.
When a balloon is released into the air, it floats effortlessly. This magical phenomenon can be explained by the science of buoyancy. The microscopic cause of the downward force exerted on air by a balloon is the effect of gravity on air particles.
As the balloon is lighter than the air surrounding it, it displaces air particles and ascends due to the buoyant force. This buoyant force is a result of the air particles being accelerated downward by gravity, creating an upward force that allows the balloon to stay afloat.
Understanding the principles of buoyancy and gravity helps us appreciate the simple yet fascinating act of a balloon floating in the air. Next time you see a balloon soaring high above, remember the invisible forces at play that make it all possible!