During which process does heat transfer occur because of density differences__________?

Related Mcqs:

1. What method of energy transfer requires no medium for transfer?

   A. Radiation 
   B. Convection
   C. Conduction
   D. A and B both

   Submitted by: Rida

2. During which process of energy exchange does cold air displace warmer air?

   A. Convection 
   B.  Radiation
   C.  Conduction
   D.  None of these

   Submitted by: Rida

3. Heat transfer horizontally within the atmosphere is called?

   A. Conduction
   B. Convection
   C. Absorption
   D. Advection

   Submitted by: Malik Asghar Hussain

4. An element that does not occur in nature but can be produced artificially is__________?

   A. Plutonium
   B. Uranium
   C. Radium
   D. Thorium

   Submitted by: WIQAR AHMAD

5. If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?

   A. Annealing
   B. Quenching
   C. Tempering
   D. Nitriding

   Submitted by: Muhammad Ali Kunbhar

6. Water has maximum density at____________?

   A. 0°C
   B. 4°C
   C. 4° K
   D. 4.8°C

7. When a star becomes a singularity and has zero volume and infinite density, it is called_______________?

   A. White dwarf
   B. Blue giant
   C. Wolf-Raynet star
   D. Black hole

   Submitted by: Mansoor Ul Haque

8. The density of Air is_____________?

   A. 0.225 kg/m3
   B. 1.025 kg/m3
   C. 1.225 kg/m3
   D. 1.425 kg/m3

   Submitted by: Ch.Naeem Kamboh

9. Density of Ice is_________?

   A. 800kg/m3
   B. 917kg/m3
   C. 930kg/m3
   D. 1000kg/m3

   Submitted by: Ch.Naeem Kamboh

10. Water has high density and minimum volume at__________?

    A. 0°C
    B. 4°C
    C. 100°C
    D. None of these

    Submitted by: Mir Turab Ali