The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?

Related Mcqs:

1. The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?

   A. 1120 ft
   B. 120 ft
   C. 56 ft
   D. 100 ft
   E. None of these

2. speed of sound in dry air at 20 °C is___________?

   A. 353 m/s
   B. 345 m/s
   C. 343 m/s
   D. none of them

   Submitted by: ARIF HUSSAIN

3. Name the branch of science which deals with the study of sound and sound waves?

   A. Aeronautics
   B. Acoustics
   C. Aerostatics
   D. Aetiology

   Submitted by: ABDUL HAYEE

4. The luster of diamond is due to_________?

   A. Reflection
   B. Total internal reflection
   C. Refraction
   D. None of these

   Submitted by: Afzal Chaudhry

5. Which of the following is used in beauty parlours for hair setting?

   A. Silicon
   B. Chlorine
   C. Sulphur 
   D. Phosphorus

   Submitted by: Mansoor Ahmed Suhag

6. The term xerostomia refers to_________?

   A. dry skin
   B. dry mouth
   C. dry nose
   D. dry head

   Submitted by: Kashif Ali Gaad

7. The production of rubber tree is better adopted to areas where the climate is_________

   A. Warm and humid
   B. Warm and dry
   C. Cool and moist
   D. cool and dry

   Submitted by: WIQAR AHMAD

8. What is Dry Ice?

   A. Solid Oxygen
   B. Solid Carbon Dioxide
   C. Solid Hydrogen
   D. Solid Nitrogen

9. Dry ice is ___________?

   A. Methane hydrate
   B. Liquid Nitrogen
   C. Solid Carbon dioxide
   D. Frozen Water
   E. None of these

10. Which type of climates of world has dry summer & wet winter ?

    A. Western European type
    B. Mediterranean type
    C. Equatorial type
    D. Tundra type

    Submitted by: Mansoor Ahmed Suhag