The correct answer is B) coal.
The industry that was influenced by the steam engine and first allowed for technological innovations in transportation was the coal industry.
The steam engine used coal to work. This new invention served to produce energy in a most powerful way than other devices.
The invention of the steam engine changed the way people produced goods in industries and in the transportation industry. Indeed, this invention transformed industries.
New machines in the fabrics helped to introduce the concept of mass production to produce goods more efficiently and at better costs. In the transportation industry, the steam engine allowed the development of railroads as the best means of transportation in the 1800s.
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Answer:Climax community is an ecological community in it final stage of succession, in which the species that makes up the community are relatively stable unless a rare earth disaster like earthquakes, fire etc destabilize the system. ... Most climax community takes hundreds and millions of years to reach stability. hopes this helps thats it
itExplanation:
By using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
<h3>Efficiency of a machine</h3>
- Efficiency is the percent of work put into a machine (input work) to that of the work done by the machine (output work).
- Efficiency of a machine is always less than 100% because the output work is always less than the input work because some of the input work is used to overcome friction.
Efficiency = work output/work input * 100%
Efficiency of fireplaces = 15%
Amount of food required to heat a room to 20°C = 15 kg
Assuming efficiency of 100%, amount of wood required will be X kg:
X = 15% * 15 kg
X = 2.25 Kg
By switching to woodstoves which are 75% efficient, amount of wood required will be Y kg:
Y = 2.25 kg / 75%
Y = 3 kg
Therefore, by using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
Learn more about efficiency of machines at: brainly.com/question/3617034
1920s-focus on things like the Harlem renaissance for example. During the roaring 1920s, inventions like home refrigeration and penicilin sent America into the modern age. The 1920s were an age of dramatic social and political change. For the first time, more Americans lived in cities than on farms. The nation’s total wealth more than doubled between 1920 and 1929, and this economic growth swept many Americans into an affluent but unfamiliar “consumer society.” People from coast to coast bought the same goods (thanks to nationwide advertising and the spread of chain stores), listened to the same music, did the same dances and even used the same slang! Many Americans were apprehensive with this new, urban, sometimes racy “mass culture”;
Focus on how with these social changes, it affected everyone in the US and the contrast could be the fact that it didn't affect those like minorities. Talk about racism and intolerance, prohibition era, The Great Depression is a good topic to touch on as well and how it forced people to move from rural to urban looking for jobs which resulted in overcrowded cities and apartments which also affected the environment in some cases. I'd do some research to further analyze it better but hopefully I gave you some things to talk about
