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Tiny droplets of water act as prisms of small angle. When white ray of light is passed through them present in air, it is dispersed which forms rainbow. Rainbow will be visible to an observer having sun at his/her back.
Tiny droplets of water act as prisms of small angle. When white ray of light is passed through them present in air, it is dispersed which forms rainbow. Rainbow will be visible to an observer having sun at his/her back.
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When clothes are washed again and again, the salts present in water as well as the detergent give them yellowish tint, making them look poor as them passes by. In order to get rid off them, there should be addition of some colour, which can offset the yellow colour. When the components of white coloRead more
When clothes are washed again and again, the salts present in water as well as the detergent give them yellowish tint, making them look poor as them passes by. In order to get rid off them, there should be addition of some colour, which can offset the yellow colour. When the components of white colour(VIBGYOR) are observed, green is neutral and the colour which offsets yellow is blue. So “blues” are added to clothes.
See lessA pressure cooker is a closed vessel. When water is heated in it, pressure of water vapour above the water surface increases, so boiling point of water rises(since a liquid boils when its vapour pressure becomes equal to the pressure above its surface) above 100°C. It means, the same mass of water cRead more
A pressure cooker is a closed vessel. When water is heated in it, pressure of water vapour above the water surface increases, so boiling point of water rises(since a liquid boils when its vapour pressure becomes equal to the pressure above its surface) above 100°C. It means, the same mass of water contains more amount of heat. As a result, the food is cooked faster in a pressure cooker.
See lessHammering of a piece of lead(Pb) means transferring kinetic energy to the lead. This causes the molecular vibration to increase and hence the temperature of the lead will be raised. This is why the piece is found to be warmer.
Hammering of a piece of lead(Pb) means transferring kinetic energy to the lead. This causes the molecular vibration to increase and hence the temperature of the lead will be raised. This is why the piece is found to be warmer.
See lessIn summer, the temperature of air in the tube increases at constant volume(like in a rubber tube), pressure of a gas is directly proportional to the absolute temperature P∝T. Therefore, pressure in the tube increases and burst when it becomes unable to sustain the pressure.
In summer, the temperature of air in the tube increases at constant volume(like in a rubber tube), pressure of a gas is directly proportional to the absolute temperature P∝T. Therefore, pressure in the tube increases and burst when it becomes unable to sustain the pressure.
See lessCentrifugation is a process which uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture. The washing machine consists of centrifuge for this purpose. A centrifuge is a piece of equipment that puts an object in rotation around a fixed axis, applyiRead more
Centrifugation is a process which uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture.
The washing machine consists of centrifuge for this purpose. A centrifuge is a piece of equipment that puts an object in rotation around a fixed axis, applying a force perpendicular to the axis of spin that can be very strong.
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The reason there are two propellers in a helicopter is because if there would be only one rotor, the helicopter would start rotating in the direction opposite to the movement of that rotor. The two rotors rotate in the opposite direction as to cancel the torque produced by one propeller. This makesRead more
The reason there are two propellers in a helicopter is because if there would be only one rotor, the helicopter would start rotating in the direction opposite to the movement of that rotor. The two rotors rotate in the opposite direction as to cancel the torque produced by one propeller. This makes the helicopter stable and safe.
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