Answer:
Desertification
Explanation:
Desertification is the process by which land becomes more desertlike and unable to support life. This happens when to many livestock overgraze an area.
What effect does temperature have on the characteristics of magma?
The temperature of the magma will affect its viscosity depending on its chemistry. Some minerals crystallize at higher temperatures than others, meaning that portions of the magma may have already solidified. At lower temperatures, the majority of the constituent minerals will have crystallized and solidified, leaving the magma highly viscous.
<span>B. Box A is a compound and Box B is an element.</span>
Answer:
As the silver crown is tested and it displaced 10.7mL of water with mass of crown = 112g
Thus density = mass of metal / volume of water displaced = 112 / 10.7 = 10.5 g /mL
The actual density of silver = 10.5g / mL
Thus the crown is made up of silver as the obtained density is same as the actual density of silver
Answer:
<u>36,000 KJ / Kg</u>
Explanation:
Calorific value is the amount of heat energy released on complete combustion
of 1 kg of a fuel.
Unit : kJ/kg
Calculation:
<em><u>Given data:</u></em>
Weight of the fuel = 5 kg
Heat produced = 180000 kJ
<u><em>To find:</em></u>
Calorific value = ?
<u><em>Formula:</em></u>
Calorific value = heat produced / weight of fuel used in Kgs
Calorific value = 180000/ 5
= 36000 kJ/kg