SMKRPK/2007/F5/PPT_PHYSICS 1. Which of the following physical quantities is not a base quantity? A Weight B Time C Temperature D Electric current 2. A radio station airs its programmes by transmitting waves at a frequency of 102.3 MHz. How much is this frequency, in Hz? A 1.023 x 10 2 B 1.023 x 10 5 C 1.023 x 10 6 D 1.023 x 10 8 3. The density of a substance Z is 9.00 x10 2 kgm -3 . In which liquid will substance Z sink? Liquid Density of liquid /kgm -3 A J 7.90 x 10 2 B K 9.20 x 10 2 C L 1.03 x 10 3 D M 1.27 x 10 3 4. Gases are more compressible than solids because A size of gas molecules > size of solid molecules B density of gas molecules > density of solid molecules C distance between gas molecules > distance between solid molecules D force between gas molecules > force between solid molecules 5. The pressure of sea water at the bottom of an ocean is 1.3 x 10 8 Nm -2 . What is the depth of the ocean? [Density of sea water = 1.02 x 10 3 kgm -3 ] A 1.27 x 10 4 m B 1.27 x 10 5 m C 1.27 x 10 6 m D 1.30 x 10 9 m E 1.33 x 10 10 m 6. The following information are the characteristics of carbon based composite substance. P: Strong Q: Resistant to heat R: Resistant to corrosion Which combination of the characteristics is used in building the body of airplane? A P and Q only B P and R only C Q and R only D P, Q and R 7. The air pressure in a car tyre is 200 kPa at a temperature of 25 O C. What is the air pressure in the tyre at a temperature of 37 O C? [Assume the volume of the air in the tyre is a constant] A 135kPa B 190kPa C 192kPa D 208kPa E 296kPa 8. The process of combining audio and radio frequency signals is known as 1