<span>There are Billions and billions of galaxies in the universe containing Trillions and trillions of stars in each galaxy.</span>
Answer:
efficiency = 5.4%
Explanation:
Efficiency of heat engine is given as
now we will have
so we will have
now we know that
so we have
so efficiency is 5.4%
climate change is a change in climate in the Earth 's normal weather patterns for different climates. it normally changes little by little over the years.the earth is cooler and warming .now it's getting warmer. this phenomenon is also known by as globall warming.it's causes are:
1.energy uses
2.agriculture and land use 3.Transport 4.Industries 5.Growing demands for food and water
A greenhouses is made from glass or clear plastic. It is useful for growing plants in winter in cooler climates.
sorry i don't know last one .
The 2015 United Nations Climate Change Conference, COP 21 or CMP 11 was held in Paris, France, from 30 November to 12 December 2015.
End date: 12 December 2015
Start date: 30 November sorry i don't know last one .
Explanation:
