Waec Physics Past Questions For Year 1989
Question 31
What is the gravitational potential due to a molecule of mass, m and at a distance, r from it? (G = gravitational constant).
- A. Gm2/r2
- B. Gm/r
- C. Gm2/r
- D. G2m2/r
- E. m2/Gr2
Question 32
Which of the following is not a property of longitudinal waves?
- A. compression
- B. reflection
- C. refraction
- D. polarization
- E. diffraction
