We all know that the density of the iceberg is less than that of the water. So, it experiences more upthrust as it displaces the water more than its weight. Hence, it floats on water.
We know that seawater is found as saline water (salt solution). So, seawater has a higher density than river water. Also, upthrustdensity. So, more upthrust is exerted in seawater than in river water. Hence, it is easier to swim in seawater than in river water.
According to the law of floatation, a body floats on a liquid if it can displace the liquid equal to its weight. The body can displace the liquid equal to its volume. The volume of nails is less. So, it displaces less water and sinks. However, the ship displaces a large amount of water and floats due to the influence of high upthrust. Hence, an iron nail sinks in water but the ship made of iron floats.
We know that upthrust exerted by water is always greater than air. So, the bucket of water is uplifted by greater upthrust of water in water but the upthrust of air isn't much effective. So, it is easier to lift the bucket of water until it remains inside the water.
We all know thatupthrust = Vdg so, upthrustd
The density of the concentrated salt solution is higher than that of pure water. So, more upthrust is exerted by the salt solution than by pure water. Hence, the egg floats in it but not in pure water.
We have, P = F/A so, P1/A
Usually, nails need more pressure to be inserted for different purposes in woods and metals. If it has a pointed end, the area of the edge is less and more pressure can be exerted with less force. So, it will be easy to work with nails. Hence, nails are made to have a pointed end.
As we all know that, P = F/A so, P1/A
In the graveled roads, there are many sharp-edged stones on the surface. While walking on it, more pressure is exerted by the sharp stones (due to less area) and it causes pain and difficulties while walking on the graveled roads.
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