Relative density = Density of substance Density of water at 4 в„ѓ The вЂњrelative densityвЂќ or вЂњspecific gravityвЂќ of a substance is defined as the ratio of its density to the density of water at 4 degrees Celsius. The relative density of a floating solid in a given liquid gives the measure of the percentage of the solid that lies below the surface of the liquid. This happens due to the up thrust or buoyant force of the liquid acting on the solid. If the relative density of the given solid is lesser than that of the given liquid, it floats in the liquid. This implies that the solid immerses in the given liquid and stays suspended at the kept position. If the relative density of the liquid and that of the solid are equal, then the solid just floats or drowns. If the relative density of the given solid is greater than that of the given liquid, it drowns in the liquid as there is a net downward force on the solid after it gets completely immersed in the liquid. Based on this principle, a device called a hydrometer was developed which helps in measuring the density of liquids with ease.ДЇor an easy approach, we consider the relative density of the substance, which is the ratio of the density of the substance to the density of water, which obviously has no units but a mere number. One of the most useful discoveries to mankind in the field of physics is ArchimedesвЂ™ principle. Lifting a bucket of water from a well, pulling a fish out of water, and a body weighing less in the air than in vacuum are examples of the effects of upthrust. Upthrust, being a force, is measured in newton (N). If F BВ > W or F BВ = W, then the body will float, This upthrust determines whether the body floats or sinks in a fluid. Upthrust can be greater than, equal to, or less than the weight (W) of the body. This property is called upthrust or buoyancy. A fluid exerts an upward force when an object is immersed in it partially or wholly. If we weigh an object in air and then in a fluid like water, the difference between the two readings gives вЂњupthrust,вЂќ which is often called the loss in weight of the object.ДЄll liquids and gases are known as fluids.

Whether a given solid drowns or not in a given liquid depends on the density of the solid in comparison with that of the liquid.ДЄccording to Archimedes principle, fluid like water exerts an upward force or upthrust on an object immersed in it completely or partially. ArchimedesвЂ™ principle states that вЂњWhen a body is immersed completely or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by the body.вЂќДЄccording to the principle, a solid that floats or is immersed in a liquid appears to lose its weight which is equal to the weight of the liquid displaced by the solid. Calculate the apparent weight and the push.ДЄnswer: The apparent weight is the weight of the object immersed in a fluid, or in other words, the result of the actual weight and thrust. W a = w-p = 40.568 N - 5.1254 N = 35.443 NДў) Weigh a cube of 10cm edge into the air resulting in 19 N and then weighed immersed in water giving a value of 17 N. The density of lead is 7900kg/m 3, then the mass of lead is

We still have to calculate this last one: Here two forces act: the push of the water upwards and the weight of the ball downwards.

It calculates the thrust and the resulting force (lead density = 7900kg/m 3).ДЄnswer: To calculate the resulting push, to calculate the push we must calculate the volume of the ball. Push = density of fluid * gravity acceleration * volume of object.ДЎ)A steel ball of 5cm radius is immersed in water.

Definition archimedes principle