In the mid-19th century, it would have taken approximately 10 minutes for a telegraph signal to travel from the east coast to the west coast of the United States. The signal would need to be relayed through a series of telegraph stations across the country.
Binary telephone signals.
It would take the signal 0.1 seconds to travel 3 metres, given the parameters that you have given.
It would take 100 years for a signal to travel from Earth to a star located 100 light years away.
East
Yes. If it didn't, then there would be no AM radio, FM radio, or TV, no Bluetooth, no cellphone, no garage-door opener, no microwave oven, no cordless telephone, no Blackberry, no satellite communication, no toy RC cars or airplanes, no police or weather radar, etc.
east.
We wouldn't have much knowledge about it and it would be extremely difficult to travel from each coast.
Train travel has many more advantages than car travel. or My train trip down the West Coast was an exciting adventure.
It would take 100 Earth years for a signal to travel from a star located 100 light years away to reach Earth.
Travel from the east coast to the west coast in 1800 was very rare, though it became more common later in the 1800s. There were no roads and no railroads, so travel was very difficult, and at some times of the year it was impossible. A wagon could go about 30 miles a day in good weather, so to travel the 3,000 miles from one coast to the other would take at least 100 days, if everything went well.
You would need to travel east from Africa to reach Virginia, which is located on the east coast of the United States.