Answer:
D.
Explanation:
Basic Answer: In the late 1800s, workers organized unions to solve their problems. Their problems were low wages and unsafe working conditions. ... First, workers formed local unions and later formed national unions. These unions used strikes to try to force employers to increase wages or make working conditions safer.
The history of films and movies began in
1890s, and the first movies with sound or sound films are known as “talking
pictures” or “talkies”. Before this the movies were silent films.
First talkie or first film with sound was released in 1927, and
name of the film was “The Jazz Singer” which was Directed by Alan Crosland and produced by <span>Warner Bros.</span>
The correct answer for this question would be BBC Pips Greenwich Time Signals.
The another name for the hourly time signal or GTS first broadcast by the RGO in 1924 is called BBC Pips Greenwich Time Signals. For 75 years the major global news headlines of the day have been preceded by the six Greenwich Time ‘pips.
Explanation:
There are six pips (short beeps) in whole, which happen on the 5 seconds heading up to the hour and on the hour itself. Each pip is a 1 kHz tone the first five of which do a tenth of a second specific, while the final pip lasts half a second.
When a leap second happens (it is indicated by a seventh pip. In this case, the first pip occurs at 23:59:55
Radio broadcasting wasn't different when the Marconi Company commenced its innovative syncromeshed in 1922. The company had been displaying from its base in Chelmsford since 1920, and on the other side of the Atlantic scheduled broadcasts (from station XWA in Montreal) had commenced in May that year .
Clara Barton's work during the civil war led to the formation of the red cross.
I hope this helped you out.
