A rubber balloon filled with hydrogen bursts when it goes up in the air because air pressure decreases. As the balloon ascends, the surrounding air pressure decreases. The pressure inside the balloon remains constant, causing the balloon to expand until ...
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Before flight, the airplane is run on the runway to reduce the friction force between the ground by the aircraft. This allows the aircraft to accelerate smoothly, overcoming inertia, and reach the necessary takeoff speed, ensuring a safe and efficient ...
When a Fortin barometer is taken to a high mountain, the mercury falls in the tube because atmospheric pressure becomes lower there. Reduced atmospheric pressure at higher altitudes causes the mercury column to drop in the barometer tube, indicating the ...
It is more difficult to breathe on mountains than on plains because as altitude increases, air pressure decreases, and the need for oxygen increases. Reduced air pressure at higher altitudes makes it harder for lungs to take in sufficient oxygen, ...
Due to the increase in the height of the atmosphere, the size of the balloon will decrease. As the balloon ascends, the atmospheric pressure decreases, causing the gas inside to expand, stretching the balloon’s material and reducing its size. Therefore, ...
The historical tower of Pisa does not fall even though it is tilted because the vertical line passing through its center of gravity passes through the base. This alignment helps stabilize the tower and prevent it from collapsing despite its ...
A person climbing a hill leans forward to increase stability. Leaning forward shifts the center of mass towards the hillside, improving balance and reducing the risk of falling backward. This position also allows for better utilization of leg muscles and ...
If a person pushes a wall but fails to displace it, then he does no work. Work is defined as the product of force and displacement in the direction of the force. Since there is no displacement, no work is ...
The work done to hold a weight of 20 kg at a height of 1 m above the ground is zero Joules. When an object is held stationary, there is no displacement, so no work is done against gravity.
An astronaut can jump higher on the lunar surface than on the Earth’s surface because the force of gravity on the lunar surface is very less as compared to the Earth’s surface. This weaker gravity allows the astronaut to exert ...