Question : In 1830, which American scientist created the world's most powerful electromagnet, the Albany magnet, which could lift to 750 pounds of metal at a time?

Question : Who founded the value of 'G'?

Question : Which pioneer scientist used radio waves to transmit signals over distances of several kilometres in the 1890s?

Question : Observing the motion of objects on an inclined plane______deduced that objects move with a constant speed when no force acts on them.

Question : Select the option that expresses the given sentence in reported speech.
The teacher says, “Every action has an equal and opposite reaction.”