Crystalline silica is hazardous when small particles are
inhaled. They can penetrate deep into the lungs and cause disabling and
sometimes fatal lung diseases including silicosis, lung cancer and kidney
disease. The particles of crystalline silica enters the lungs and causes the
formation of scar tissue known as silicosis, thus reducing the lungs’ ability
to take in oxygen.
We can use two equations for this problem.<span>
t1/2 = ln
2 / λ = 0.693 / λ
Where t1/2 is the half-life of the element and λ is
decay constant.
20 days = 0.693 / λ
λ = 0.693 / 20 days
(1)
Nt = Nο eΛ(-λt) (2)
Where Nt is atoms at t time, No is the initial amount of substance, λ is decay constant and t is the time
taken.
t = 40 days</span>
<span>No = 200 g
From (1) and (2),
Nt = 200 g eΛ(-(0.693 / 20 days) 40 days)
<span>Nt = 50.01 g</span></span><span>
</span>Hence, 50.01 grams of isotope will remain after 40 days.
<span>
</span>
<u>Answer:</u>
<em>Substances known as </em><u>electrolytes</u><em> are found in blood which includes sodium and potassium.</em>
<u>Explanation:</u>
<em>Electrolytes are electrically charged particles</em> and they help in moving nutrients into the cell and removing waste particles out of the cell. Other <em>functions of electrolytes</em> include maintaining the salt level as well as <em>pH level of the body. </em>
The electrolyte potassium is present in <em>small quantities in the fluid part of blood, namely plasma.
</em>
Regulating body muscle contraction is the main function of potassium. The fluid region outside cells contains a <em>major portion of sodium which maintains the water balance of the body.
</em>
Number #2 is joule
In the SI system the unit of heat is the joule. The calorie was defined so that the heat capacity of water was equal to one.The heat capacity of a substance is the amount of heat required to raise the temperature of a defined amount of pure substances by one degree.
Number #3 is Endothermic
Why? I can't explain. I Just left class where they were just explaining that.
Answer:
El ciclo hidrológico comienza con la evaporación del agua desde la superficie. A medida que se eleva, el aire humedecido se enfría y el vapor se transforma en agua: es la condensación. Las gotas se juntan y forman una nube. Luego caen por su propio peso: es la precipitación
Explanation: