Waec Physics Past Questions For Year 1996
Question 56
Which of the following substances is most viscous at room temperature?
- A. Water
- B. Alcohol
- C. Petrol
- D. Palm oil
- E. Kerosine
Question 57
What is the decay constant of a radioactive element whose half-life is 3 seconds
- A. 0.132s-1
- B. 0.23s-1
- C. 0.347s-1
- D. 0.693s-1
- E. 0.924s-1
Question 58
The count rate of an alpha-particle source is 400 per minute. If the half-life of the source is 5 days, what would be the count rate per minute after 15 days?
- A. 20
- B. 25
- C. 50
- D. 200
- E. 400
Question 59
Which of the following particles/rays do not originate from the nucleus of an atom?
- A. Alpha particles
- B. Beta particles
- C. Neutrons
- D. Gamma rays
- E. X-rays
