Last seen: Jan 25, 2021
Consider a block of wood kept on a table top. The mass of the wooden block is 5 kg. Its dimension is 40 cm x 20 cm x 10 cm. Now, we have to find the...
Fluids are the substances which can flow e.g., gases and liquids are fluids. Archimedes’ principle is based on the upward force exerted by fluids on a...
The cork floats on water because the density of cork is less than the density of water, and another cork sinks in the oil because the density of cork ...
Archimedes’ principle: When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid ...
Relative density of gold = 19.3 Relative density of gold = ∴ Density of gold = Relative density of gold x Density of water = 19.3 x 103 kg/m3 ...
It means that the density of silver is 10.8 times more than that of water.
Lactometer is a device used to find the purity of a given sample of milk. Hydrometer is a device used to find the density of liquids.
Camels feet are broad and the larger area of the feet reduces the force/ pressure exerted by the body on the sand. But when we have to walk on the sam...
The iron rod sinks due to high density and less buoyant force exerted by the water on it, but in case of ship the surface area is increased, the upthr...
The relative density of a substance is the ratio-of its density to that of water. Relative density =
The density of a substance is defined as mass per unit volume. Its unit is kg/m3.
The swimmer is exerted by an upward force by water, this phenomenon is called buoyancy and it makes the swimmer feel light.
The force exerted when acts on a smaller area, it exerts larger pressure. So the nails have pointed tips.
The pressure of water in dams at the bottom is more, to withstand this pressure the dams have wider walls.
To increase the pressure, area is reduced, As pressure ∝ 1/Area hence the pressure or force exerted on a body increases.
The pressure exerted by it can be distributed to more area, and avoid the wear and tear of tyres.
The density of sea water is more due to dissolved salts in it as compared to the density of river water. Hence the buoyant force exerted on the swimme...
The force exerted per unit area is called pressure.
The net force exerted by a body in a particular direction is called thrust.
The S.I. unit of pressure = N/m2 = Pascal.