Waec Physics Past Questions For Year 1988
Question 11
Which of the following is a reason why a concrete floor feels colder to the bare feet than a mat on the same floor during the rainy season?
- A. A mat if s better conductor of heat than the feet
- B. Mat losses heat to the bare feet at a faster rate than concrete floor
- C. Mat losses heat to the bare feet while the concrete floor extracts heat from them
- D. Concrete floor is a better conductor of heat than the mat
- E. Mat is a better conductor of heat than the floor
Question 12
A given mass of gas has a pressure of 80Nm-2 at a temperature of 47oC. If the temperature is reduced to 27oC with the volume remaining constant, the new pressure is
- A. 46.0 Nm-2
- B. 75.0 Nm-2
- C. 80.0 Nm-2
- D. 85.3 Nm-2
- E. 139.4 Nm-2
Question 13
The clinical thermometer is characterized by having a
- A. wide range of temperature
- B. wide bore
- C. long stem
- D. constriction
- E. narrow bore
Question 14
Which of the following cannot be used to measure the temperature of a substance?
- A. variation of pressure with temperature
- B. expansivity of a liquid
- C. change in resistance of a conductor
- D. thermometric effect
- E. change in color with temperature
Question 15
Which of the following statements about the gaseous state of matter is not correct? The molecules of a substance is in gaseous state
- A. are in constant state of motion
- B. have different speed
- C. have a temperature which is an average measure of the kinetic energy
- D. have no intermolecular attractive force
- E. have a pressure which is determined by the number of molecules present
