مادے کی خصوصیات

Written by Dr. Hamza Farooq (Physics)

نویں جماعت · طبیعیات · 10 سوالات

نام: ____________________ تاریخ: ____________

Density is defined as:
- A Mass / volume
- B Volume / mass
- C Mass x volume
- D Weight / area
A block has a mass of 200 g and a volume of 50 cm³. What is its density?
- A 10000 g/cm³
- B 0.25 g/cm³
- C 4 g/cm³
- D 150 g/cm³
Pressure is force per unit:
- A Volume
- B Time
- C Length
- D Area
The SI unit of pressure is the:
- A Newton
- B Pascal
- C Joule
- D Watt
Hooke's law states that within the elastic limit, the extension of a spring is proportional to:
- A Its length
- B Its colour
- C Its temperature
- D The applied force
A ship floats because the upthrust on it equals its:
- A Density
- B Volume
- C Weight
- D Speed
Pressure at a point in a liquid increases with:
- A Container shape only
- B Depth
- C Colour
- D Surface area only
A hydraulic press works on:
- A Pascal's law
- B Archimedes' principle
- C Hooke's law
- D Newton's first law
Atmospheric pressure at sea level is about:
- A 10 Pa
- B 1000 Pa
- C 101000 Pa
- D 10⁹ Pa
An object is fully immersed in water. The upthrust equals the weight of:
- A Water displaced
- B Air displaced
- C The object
- D The container

جوابی کلید

1. A, 2. C, 3. D, 4. B, 5. D, 6. C, 7. B, 8. A, 9. C, 10. A

Density = mass / volume.
Density = 200 / 50 = 4 g/cm³.
Pressure = force / area.
One pascal is one newton per square metre.
Within the elastic limit, extension is directly proportional to the applied force.
A floating body is in equilibrium: the upward buoyant force equals its weight.
P = rho g h.
Pressure applied to an enclosed liquid is passed on equally.
It is about 101 kPa.
This is Archimedes' principle.