Pressure is the force exerted on a surface per unit area. In water, pressure is caused by the weight of the water above the surface.
In water, pressure increases with depth. This is because there is more water above the surface at greater depths, resulting in a greater force being exerted on the surface.
No, pressure is not the same at all depths in water. As mentioned before, pressure increases with depth. Additionally, factors such as temperature and salinity can also affect pressure in water.
No, pressure exists in all fluids including liquids and gases. It is caused by the weight of the fluid above the surface.
Pressure in water is typically measured in units of pressure such as pounds per square inch (psi) or pascals (Pa). This can be done using instruments such as pressure gauges or manometers.