What is the name of a machine used in trains for the announcement of name of the next station before it's arrival?
It's just a plain loudspeaker system wired to a computer that detects where the next station is.
It is known in the UK as PIS (Passenger Infomation System)
In most cases you buy it at the station before you get on the train. Either at a manned ticket counter or from a machine. If it is for a long distance train, and you want to buy it many days in advance, you can often buy the ticket on the internet. In a very few cases for local trains where the station is unmanned and does not have a ticket machine, you can buy…
Assuming this question is asking about about trading items before the arrival of the Spaniards (or Cortes): The Aztec people did not have guns before the arrival of the Spaniards. Once the Spaniards arrived, the Aztecs traded their goods (gold, food, etc.) with the Spanish people for guns and gun powder.
In Canada we call it 'Vital Statistics' and there will be a minimal cost for a copy of the newspaper wedding announcement or, you can go to your local library and ask the librarian where you can find old newspaper clipping on micro fish. Before you do either check around with relatives to see if they have kept a copy of the wedding announcement and then take a copy of it.
Either voice, via conventional radio transmissions; Or "Morse Code" (CW, or Continuous Wave) communication. the machine that they used was to send the codes to the other station during the war, and to tell if there were going to be enemys near by, and so that they can attacked them before the enemy did.
The seismometer records the P and S-wave arrival times. P-waves travel faster through the earth than S-waves and so they arrive at the seismometer station before the S-waves and are recorded by the seismometer first. The difference in arrival time between the two types of seismic wave can be used to calculate the distance of the earthquake's epicentre from the seismometer. This can then be plotted on a map, by drawing a circle with a…
What type of achievements did native americans in north and south america make before the arrival of columbus?
Which Native American group did NOT live in the Northwest Coast area before the arrival of European explorers?
What types of achievements did American Indians in North and South America make before the arrival of Columbus?
A "promo" is a "promotional" announcement of some sort, that generally says something like "You and all your friends should listen to this radio station as much as you can because it is the greatest." The reason for these announcements is to build the station's listening audience by convincing you that this station is cool. A "station ID" or "Identification" is a legal requirement of every licensed radio station. When I was on the radio…