Question

Who made the first phone in the world ?​

Answer 1

Answer:

hope it helps you follow please

Explanation:

The first handheld mobile phone was demonstrated by John F. Mitchell[2][3] and Martin Cooper of Motorola in 1973, using a handset weighing c. 2 kilograms (4.4 lbs).[4] In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan.[citation needed] In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone.

Answer 2

Answer:

mene

Explanation:

You are provided with a sample of Ethanoic acid in a test tube .what would you observe while

studying it’s effect on red litmus, blue litmus and powdered sodium hydrogen carbonate ? state

briefly .What is observed after sometime of adding strips of zinc and copper separately to ferrous sulphate

solution filled in two beakers ? Name the reaction if any change in colour is noticed .Also write

chemical equation for the reactionDraw a labelled diagram of electric motor.