Alexander graham bell used an electrical wire to
a. transmit radio waves.
c. transfer power to machines.
b. build a better light bulb.
d. send voices over long distances.

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is