According to the big-bang theory how the universe might end?

If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets.

According to the big bang theory, it is the phenomenon which has given birth to the universe that now we live in. The expansion of Universe occurred at a very high speed which resulted into a huge explosion but it took place in a very short period of time. Due to the reasoning it is referred to take place from a small singularity which was very densely populated with matter and antimatter. These came into existence and later on, the atoms combined to form molecules and gases.

Explanation:

As per the approval of the Big Bang Theory simply prior to the investigation of Dark Energy during the year 1990s. The cosmologists had proceeded to grant on two situations as signifying the commonly expected consequences for our Universe.

Primarily the generally recognized as the “Big Crunch” synopsis, the universe will approach the greatest size and suddenly start to collapse in upon itself. This will barely be feasible if the size density of the Universe is larger than the significant density.

The Second situation is termed as the Big Freeze. The density in the galaxy was comparable to or under the demanding density, the development would reduce without stopping.  

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a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

-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