Force acting on a unit area is called…………… (b) It is the……………. force which makes objects appear lighter in water.
Fill in the following blanks with suitable words :
(a) Force acting on a unit area is called……………
(b) It is the……………. force which makes objects appear lighter in water.
(c) A heavy ship floats in water because its……………… density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in………………… directions, and pressure………………… as the depth increases.
(e) In order to sink in a fluid, the density of an object must be……………………… than the………………… of the fluid.
(f) Snow shoes work by spreading out a person’s…………………over a much bigger…………………
(g) If the area of a snow shoe is five times……………………. than the area of an ordinary shoe, then the pressure of a snow shoe on the snow is five times……………………
(a) pressure
(b) buoyant
(c) average
(d) all; increases
(e) less; density
(f) weight; area
(g) bigger; smaller
-
A 1 kg sheet of tin sinks in water but if the same sheet is converted into a box or boat, it floats. Why?
3 years ago
-
A boy gets into a floating boat. (a) What happens to the boat? (b) What happens to the weight of water displaced?
3 years ago
-
When a golf ball is lowered into a measuring cylinder containing water, the water level rises by 30 cm^3 when the ball is completely submerged.
3 years ago
-
A beaker full of water is suspended from a spring balance. Will the reading of the balance change: (a) if a cork is placed in water? (b) if a piece of heavy metal is placed in it? Give reasons for your answer.
3 years ago
-
If a fresh egg is put into a beaker filled with water, it sinks. On dissolving a lot of salt in the water, the egg begins to rise and then floats. Why?
3 years ago
- 321 Forums
- 27.3 K Topics
- 53.8 K Posts
- 17 Online
- 12.4 K Members