WAEC Physics Past Questions & Answers - Page 265

A charge of 1.6 x 10^-10C is placed in a uniform electric field of intensity 2.0 x 10⁵NC^-1. What is the magnitude of the electric force exerted on the charge?

What is the escape velocity of a body on the surface of the earth of radius R if the gravitational constant is G and the mass of the earth is M? (Neglect energy losses to the surroundings)

A listener can detect the instrument from which a note is being sounded because different instruments produce the same note with a different.

The period of a wave is 0.02 second. Calculate its wavelength if its speed is 330 ms^-1

A sound note of frequency 250 Hz and wavelength 1.3m is produced at a point near a hill. If the echo of the sound is received 1 second later at the point, how far away is the hill from the point?