Physics (SS1-3rd term) Mid-term test 24/25

Section A (objective) 5marks - ½mark each

1. The axial relationship of a monoclinic crystal system is given as:

2. Crystals are built up form simple structural unit called _________

3. Examples of amorphous substances are as follows, Except

4. The force that acts on a fluid making it behave as a stretched elastic skin is called

5. Manual method of measuring viscosity are as follows, EXCEPT

6. Weight is measured in

7. Attraction of molecules of different substance is termed as

8. Which of the following has a concave meniscus?

9. One of these is not among the other names of capillarity

10. Coefficient of a phenomenon in physics simply means the ______________ of the phenomenon.

Section B (Subjective) 5marks

1. Formula for surface tension is ____________

2. The symbol of viscosity is pronounced as _________.

3. Make "h" the subject πr²ρhg = 2πrγ (show working)

4. "h" in the equation above is termed/called _____________.

5. Unit cells are also called a ____________.

Section C (THEORY) 10marks

1. When a capillary tube is dipped in a vessel of water, the water rises 5.75mm beyond the surface of water in the vessel. Calculate the radius of the tube , Assume the surface tension of the water to be 7.5×10-⁴N/m, angle of contact of water/Glass to be 130⁰, density of water to be 10³kgm-³ and gravity is 9.8m/s². (4mks)

2. Draw the following crystal system: (a) Rhombohedral (b) Orthorhombic (c) Hexagon (3mks)

3. A metal piece 0.01 long is supported by the surface of the liquid, calculate the surface tension if the weight of the pieces is is 0.1N. (3mks)