In the technological development of engines, trial and error played an important role. Improved engines were often made by trial and error. That is, trying to overcome a drawback of an existing engine or the impracticality of a proposed engine design led to the development of a new engine. Match the engines in the following list with their drawbacks. Place your answer in the blank space given.
-This engine was large and massive and less efficient than thought possible.
Answer 1

-The boiler could not withstand the steam pressure needed to lift water beyond 6 m.
Answer 2

-The continual reheating needed after each cooling of the engine cylinder required a tremendous amount of thermal energy.
Answer 3

The engine had no mechanism to move the piston back to complete a cycle.
-Answer 4

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation:

its a circle not a square that's simple silly.

explanation: