When did motion pictures start? The first to present projected moving pictures to a paying audience were the Lumière brothers in December 1895 in Paris, …
Why is hydropower considered an inexhaustible resource? Turbines and generators capture and convert that energy into electricity, which is then fed into the electrical grid. …
How did he invent the telephone? Thomas A. Watson, one of Bell’s assistants, was trying to reactivate a telegraph transmitter. Hearing the sound, Bell believed …