A fish lying inside water appears slightly above its actual depth due to the refraction of light. When light passes from water to air, it bends away from the normal. This bending causes the fish to appear at a shallower ...
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When a compact disc (CD) is viewed in sunlight, the colors similar to those of a rainbow are seen due to the phenomena of reflection and diffraction. The CD’s surface consists of closely spaced tracks that act as a diffraction ...
The temperature of an object indicates that on contact, heat will flow from that object to an object at a higher temperature. Heat naturally transfers from regions of higher temperature to regions of lower temperature until thermal equilibrium is reached.
To reduce angular speed on a freely rotating platform, a person should spread their hands outwards. This increases the moment of inertia, causing the rotational speed to decrease according to the conservation of angular momentum.
The force of Earth’s gravity acting on a body of mass 1 kg is calculated using the formula F = m x g, where g is the acceleration due to gravity (9.8 m/s²). Therefore, the force is 1 kg x ...
On removing butter from milk, the density of milk increases. This is because butter is less dense than milk. When butter is removed, the remaining liquid is denser than the original mixture.
Shock absorbers are usually made of steel because its elasticity is high. High elasticity allows steel to absorb and dissipate energy efficiently, making it ideal for withstanding the repeated stress and strain experienced in shock absorption.
There is no atmosphere on the Moon because its escape velocity is less than the root mean square velocity of atoms. This means that gas molecules on the Moon can easily escape into space due to insufficient gravitational pull, resulting ...
One Horse Power (H.P) is equal to 746 watts. This conversion factor is used to measure the power output of engines and motors.
A runner runs for some distance before taking a long jump because running increases the inertia of his body, helping him cover more distance during the jump. This momentum gained from running aids in achieving greater distance in the jump.