Science
Pressure
Grade 8 · Middle School
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- Question 1 of 20Easy
Pressure is defined as ...
- Question 2 of 20Easy
The SI unit of pressure is the ...
- Question 3 of 20Easy
A knife is made sharp with a small surface area so that ...
- Question 4 of 20Easy
The hydrostatic pressure of a liquid depends on ...
- Question 5 of 20Easy
Archimedes' principle states that an object immersed in a liquid experiences a buoyant force equal to ...
- Question 6 of 20Easy
The instrument used to measure air pressure is a ...
- Question 7 of 20Medium
A force of 100 N acts on an area of 0.5 m^2. The pressure produced is ...
- Question 8 of 20Medium
The hydrostatic pressure at a depth of 2 m in water (rho = 1,000 kg/m^3, g = 10 m/s^2) is ...
- Question 9 of 20Medium
A wooden block floats on water because ...
- Question 10 of 20Medium
Pascal's principle is applied in ...
- Question 11 of 20Medium
The higher a place is above sea level, its air pressure ...
- Question 12 of 20Medium
The tip of a needle is made sharp so that ...
- Question 13 of 20Medium
In a hydraulic jack, a 10 cm^2 piston is given 20 N of force. If the large piston is 100 cm^2, the lifting force is ...
- Question 14 of 20Medium
A steel ship can float on the sea because ...
- Question 15 of 20Hard
A block weighs 50 N. When weighed in water, its weight becomes 40 N. The buoyant force on the block is ...
- Question 16 of 20Hard
An object of mass 500 g and volume 200 cm^3 is put into water (rho = 1 g/cm^3). The object will ...
- Question 17 of 20Hard
A hydraulic pump has a small piston of 20 cm^2 and a large piston of 200 cm^2. If the small piston receives 50 N, the force on the large piston is ...
- Question 18 of 20Hard
The ratio of hydrostatic pressure at a depth of 1 m to that at a depth of 3 m (same liquid) is ...
- Question 19 of 20Hard
An object floats in water (rho = 1 g/cm^3) with 40% of its volume submerged. The object's density is ...
- Question 20 of 20Hard
The wall of a dam is made thicker at the bottom. The reason is ...