Question 4301:

• WAEC 2021

Which of the following statements about the universal gravitational constant, G, is true?

A. It is fundamental quantity.
B. It has dimension M-¹L³T-².
C. Its S.I. unit is N m\(^2\)kg
D. It is a vector quantity

Question 4302:

• WAEC 2021

The sketched graph represents a progressive wave moving from the left to the right. The period the wave is 0.125s.
Determine the values of the amplitude and wavelength, respectively, of the wave.

A. 8 cm; 27 cm
B. 8 cm; 9 cm
C. 4 cm; 9 cm
D. 16 cm; 27 cm

Question 4303:

• WAEC 2021

Determine the speed of the wave.

A. 64 cm/s
B. 32 cm/s
C. 24 cm/s
D. 72 cm/s

Question 4304:

• WAEC 2021

Which of the following curved surfaces will produce a real image? I. Concave mirror II. Convex mirror III. Diverging lens IV. Converging lens

A. I and III only
B. I, II and IV only
C. II, III and V only
D. II and IV only

Question 4305:

• WAEC 2021

The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.

A. (3.7, 7.4)
B. (6.2, 9.9)
C. (2.5, -4 .8).
D. (14.7, 1.4)