Answer:
True
Explanation:
When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide. A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium combine in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction. An exothermic reaction is a term that describes a chemical reaction in which there is a net release of energy (heat).
Answer:
c) 200 additional D.A should be paid.
Explanation:
o calculate D.A first calculate inflation rate between 1980 and 1984.
Inflation Rate = × 100
Inflation Rate = × 100
= 25%
If 800 is the basic salary then D.A should be according to inflation rate 25% of the salary.
D.A = 800 ×
= 200
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The moment of inertia for rotation about the perpendicular axis through the edge of the disk is 3.78 × 10⁻⁵ kgm².
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Moment of inertia</h3>
Moment of inertia is referred to as the product of mass of section and the square of the distance between the reference axis and the centroid of the section.
Moment of inertia of solid cylinder or disk is expressed as;
I = 1/2 × mr²
Given the data in the question;
- Mass of disk m = 21g = 0.021kg
- Diameter of disk d = 12cm = 0.12m
- Radius r = d/2 = 0.12m / 2 = 0.06m
We substitute our given value into the expression above.
I = 1/2 × 0.021kg × (0.06m)²
I = 1/2 × 0.021kg × 0.0036m²
I = 3.78 × 10⁻⁵ kgm²
Therefore, the moment of inertia for rotation about the perpendicular axis through the edge of the disk is 3.78 × 10⁻⁵ kgm².
Learn more about Moment of inertia: brainly.com/question/19427495
Answer:
C is the answer
Explanation:
There are four 6 and when we take 6 common their power is added that sums up to 4.
