density and upthrust

Introduction - The pressure exerted by a liquid on the base of the container depends on the vertical height of the liquid over it not on the area of cross-section. As one goes deeper in the swimming pool, the pressure on the ear drum is found to increase. A column of mercury exerts more pressure th..

Record your observations as shown below: Weight of sinker in water = x gf Weight of sinker in water + cork in air = y gf Weight of cork in air = (y - x) gf Weight of cork + sinker in water = z gf Upthrust on cork in water = (y - z) gf The upthrust on cork in water also re..

A solid weighs 50 gf in air and 44 gf when completely immersed in water. Calculate (i) R.D of the solid (ii) upthrust (iii) density of the solid in cgs and SI unit..

Hot air displaces a balloon, producing upthrust. This upthrust is balanced by the weight of the balloon. The balloon displaces a volume of air equal to its own volume. The air displaced is heavier than the air in the balloon as hot air is lighter than the cold air of same volu..

>Thus in all the three cases when the objects are in water they experience a lifting force within the water and this force is called the upthrust. The force of the upthrust is equal to the weight of liquid displaced by the body. When a body is placed in water, the upthrusth..

> A solid weighs 50 gf in air and 44 gf when completely immersed in water. Calculate (i) R.D of the solid (ii) upthrust (iii) density of the solid in cgs and SI units. Suggested answer : (i) R.D = 8.33 (ii) upthrust = loss of weight = 6 gf (iii) density in cg..

Consider a solid cylinder of height 'h' and area of cross-section A, to be completely immersed in a fluid of constant density r . The horizontal thrusts on the cylinder balance each other...

. The density of the acid can then be read on the floating hydrometer. The acid in a fully charged cell should have a relative density of 1.25 to 1.30. A reading of less than 1.18 indicates that recharging is necessary. Solved Examples:- Example 1:- A body weighs 600 g in air an..

When an object is placed on the surface of a liquid it will either float or sink. This depends upon two forces: The weight W 1 acting vertically downwards, which is due to the gravitational pull of the earth, and Upthrust or buoyant force acting vertically upwards, which is equal t..

. For example, fish has an air sac, called a swim bladder in its body. This is filled with air and usually occupies about 5 per cent of its total body volume. Its size is adjusted so that the fish is posed at the depth at which is usually lives and feeds. At that level, the condition of its weight ..