Answer:
Energy added to cold water, E1
E1 = m•Cp•ΔT = 6 x 4.187x(42-20) = 6x4.187x22
Energy lost by hot water, E2:
E2 = X(CpΔT) = X x 4.187 x (75-42) =X x 4.187 x 33
So, since E1 = E2
6x4.187x22 = X x 4.187 x 33
X = 6x22/33 = 4.0kg
So the mass of the hot water added to the 6kg of cold water is 4.0kg
The answer is Chronic<span> Stress</span>
I don't know my mom use it but we also use leaves because she says that it help's our bushes grow?!
The answer is (D). Creating more fossil fuels.
Fossil fuels are formed by the compression of the dead matter of plants and animals within the crust of the Earth. The plants and animals that died due to some calamity millions of years ago got covered by the rocks and soil. The internal heat of the Earth and the pressure due to the weight of the rocks turned them into thick dark crude oil. This process is natural and time consuming. It is impossible to recreate this process by artificial means on a large scale to make more solid fuels.
Interestingly, mining of extra-terrestrial planets, moons and asteroids is an ongoing research and the means to do it are being prototypes in the research laboratories of NASA and other space organisations.
