Last seen: Nov 14, 2021
Volume of golf ball = rise in water level = 30 cm3 Density of ball = = = 1.1 g/cm3
(a) The reading of spring balance will not change if a cork is placed in water because cork, being lighter than water, floats in water. (b) The rea...
When a lot of salt is dissolved in water, then the density of salt solution becomes much more than pure water. Due to its much higher density, the sal...
The reading on spring balance will be zero. This is because the weight of floating block of wood is fully supported by the liquid in which it is float...
The body will sink less in water. This is because the density of water is more than that of kerosene due to which water will exert a greater upward bu...
No, it is not necessary that their weights in air should also be the same. This is because the two bodies have undergone the same loss in weight on co...
The two equal weights of unequal volumes which are balanced in air, will get imbalanced when they are completely dipped in water because due to their ...
Weight of elephant = 40000N Area of one foot = 1000 cm2 = 1000 x 10-4 m2 Weight of girl = 400N Area of heel of girl = 1 cm2 = 1 x 10-4 m2 ...
(a) A floating boat displaces water equal to its own weight. This displaced water exerts buoyant force to balance the weight of boat and keep it afloa...
(a) Those substances which can flow easily are called fluids. All the liquid and gases are fluids, like water, air etc. (b) Archimedes’ Principle :...
(a) Pressure is the force acting perpendicularly on a unit area of the object. (b) Pressure = (c) (i) Pressure on an area of 10 m2 Force = 200 ...
(a) According to the principle of floatation: An object will float in a liquid if the weight of object is equal to the weight of liquid displaced by i...
(a) The upward force acting on an object immersed in a liquid is called buoyant force. Factors affecting buoyant force: (i) Volume of object imm...
(a) Density of substance = (b) For material A Mass = 5kg Volume = 20 cm3 = 20 x 10-6 m3 Density of material A = = 0.25 x 106 kg...
The object will weigh less in water because an upward force (buoyant force) equal to the weight of water displaced acts on the object when immersed in...
Volume = 3 m3 Mass = 9 kg Density of substance = Density of substance = = 3 kg/m3 And density of water = 1000 kg/m3 The object will float ...
Force, F = 550 N Area of contact of one shoe = 160 cm2 = 160 x 10-4 m2 Area of contact with two shoes =160 x 2 = 320 cm2 = 320 x 10-4 m2 (...
If the area is made one-third i.e. 1 m2, then the force would be Pressure = Force = Area x Pressure = 3 x 10 = 30 N If the area is made one...
(a) Buoyant force (b) Force of friction (c) Gravitational force (d) Reaction force
Camels have large flat feet so that there is a greater area in contact with the sand which produces less pressure on the sand and the camels can move ...