A swimmer finds it easier to swim in seawater than in a river because the density of seawater is higher than that of ordinary water. The higher density provides more buoyant force, which helps the swimmer to float and swim ...
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The density of water is maximum at 4 °C. At this temperature, water molecules are packed closely together due to hydrogen bonding, resulting in the highest density. Both higher and lower temperatures cause the density of water to decrease.
When a solid body is immersed in water, its weight decreases. This loss is equal to the weight of displaced water. According to Archimedes’ principle, the buoyant force acting on the body is equal to the weight of the displaced ...
An iron nail floats in mercury, whereas it sinks in water because the density of iron is more than that of water and less than that of mercury. Iron’s density is between that of water and mercury, allowing it to ...
When a ship sailing in a river reaches the sea, the level of the ship will fall slightly. This occurs because the density of seawater is higher than river water, causing a slight decrease in buoyant force and consequently a ...
It is easier to roll a wooden cylindrical barrel instead of pulling it because the friction force of rolling state is much less than the friction force of sliding state. Rolling reduces friction compared to sliding, making it easier to ...
Walking on snow is more difficult than walking on the road because there is less friction in snow than on the road. The uneven surface and lower friction of snow make it harder to gain traction and maintain stability while ...
Cleaning a carpet by beating it with a stick follows the third law of motion. When the stick strikes the carpet, it exerts a force on it, and the carpet exerts an equal and opposite reaction force on the stick, ...
For a steel boat floating in a lake, the weight of water displaced by the boat is equal to the weight of that part of the boat which is below the surface of the water of the lake.
When the temperature is dropped from 9°C to 3°C, the volume of water will decrease. Water exhibits anomalous behavior near 4°C, where it contracts upon cooling until it reaches 4°C, then expands upon further cooling. Therefore, the volume will first ...