by Sunday | Jan 11 | Physics WAEC
A. 340 ms−1 B. 380 m s−1 C. 400 m s −1 D. 680 m s−1 Correct Answer: Option A – 340 ms−1 Explanation speed of the sound wave = distance ∗ 2/time = 408∗2/2.4 : speed of the sound wave = 340...
by Sunday | Jan 11 | Physics WAEC
A. longitudinal B. transverse C. mechanical D. a sound wave Correct Answer: Option B – transverse Explanation In physics, a transverse wave is a wave whose oscillations are perpendicular to the direction of the wave’s advance. This is in contrast to a...
by Sunday | Jan 9 | Physics WAEC
A. 15 hours B. 30 hours C. 45 hours D. 60 hours Correct Answer: Option C – 45 hours
by Sunday | Jan 9 | Physics WAEC
A. high velocity electrons are abruptly stopped in metals B. energy changes occur within the nuclei of atoms C. energy changes occur within the electronic structure of atoms D. electrons are deflected in very strong magnetic fields Correct Answer: Option B –...
by Sunday | Jan 9 | Physics WAEC
I. Alpha Il. Gamma IIl. Beta A. I < III < II B. II < I < III C. II < III < I D. I < II Correct Answer: Option C – II < III < I Explanation Alpha particles are highly ionising because of their double positive charge, large mass...
by Sunday | Jan 9 | Physics WAEC
A. the semiconductor is heated up B. a donor element is added C. an acceptor element is added D. the semiconductor is conducted to a battery Correct Answer: Option C – an acceptor element is added Explanation If the dominant impurity atoms are ACCEPTOR type in...
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