Joanne has to undergo a Breast Reconstruction Surgery in order to repair her breasts.
The Solar System model that changed the view of the people about the Earth and the other objects in the sky was proposed by the Polish astronomer Nicolai Copernicus in the 16th century.
Copernicus, by observing the sky and the objects on it, managed to get to a conclusion that drastically differed from the viewpoint that was in place for almost 2,000 years. He proposed that the Earth is actually not the center of the universe, but that that position is held by the Sun, while the Earth and the other planets are spinning around the Sun.
In the Solar System model we can observe the Sun as the largest object, situated in the middle, being static. All the other planets, including the Earth, are spinning around the Sun. The Moon on the other hand is spinning around the Earth, being the only object to do so, but it is also spinning around the Sun as the other objects.
Answer:
Air temperature is not accurate but it can measure by the air is cold or hot
Hope this will help you
Answer
a)
:
= +ve
b)
:
= -ve
c)
:
= +ve
d)
:
= +ve
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
a) ![PbCl_2(s)\rightarrow Pb^(2+)(aq)+2Cl^-(aq)](https://tex.z-dn.net/?f=PbCl_2%28s%29%5Crightarrow%20Pb%5E%282%2B%29%28aq%29%2B2Cl%5E-%28aq%29)
As solid is moving to ions form , randomness increases and thus sign of
is positive.
b)![MgO(s)+CO_2(g)\rightarrow MgCO_3(s)](https://tex.z-dn.net/?f=MgO%28s%29%2BCO_2%28g%29%5Crightarrow%20MgCO_3%28s%29)
As gaseous reactants are converted to solid products , randomness decreases and thus sign of
is negative.
c) ![CO_2(aq)\rightarrow CO_2(g)](https://tex.z-dn.net/?f=CO_2%28aq%29%5Crightarrow%20CO_2%28g%29)
As liquid is changing to gas randomness increases and thus sign of
is positive.
d) ![C_5H_{12}(l)+8O_2(g)rightarrow 5CO_2(g)+6H_2O(g)](https://tex.z-dn.net/?f=C_5H_%7B12%7D%28l%29%2B8O_2%28g%29rightarrow%205CO_2%28g%29%2B6H_2O%28g%29)
As 8 moles of gaseous reactants are converted to 11 moles of gaseous products , randomness increases and thus sign of
is positive.
Alpha particle is nucleus of a helium-4 atom, which is made of two protons and two neutrons.
Nuclear reaction: ²²²Rn → ²¹⁸Po + α (alpha particle).
Alpha decay is radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and transforms into an atom with an atomic number that is reduced by two and mass number that is reduced by four.