Explanation

Ferrum is a Latin word.

Ferrum means Iron. 

Explanation

Matter is a substance made up of various types of particles that occupy physical space and have inertia

Following are the basic three states of matter:

1. Solid
2. Liquid
3. Gas

ND4-4-20234

Explanation

Rubies are scientifically known as corundum, a rock-forming mineral and crystalline form of aluminium oxide which is two aluminium atoms and three oxygen atoms (Al2O3) in a close packed hexagonal structure.

Corundum typically contains traces of iron, titanium, vanadium and/or chromium.

Explanation

Explanation

Graphite is used for making the electrode in a dry cell.

Graphite is a good conductor of electricity, in fact, as good as metals

Graphite is used as an electrode because it conducts electricity without taking part in the chemical reaction

ND5.3.2023

Explanation

• Cu is the chemical symbol for copper
• Atomic Number: 29
• Element Type: Transition metal
• Main Uses: Electrical wires, plumbing pipes, and coins
• Properties: Great at carrying heat and electricity

Explanation

In free fall motion a body fall under gravitational force which we assume constant near earth. Thus body falls with uniform acceleration.

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RY632023

Explanation

Energy is carried by Stationary Wave. 

 Violet light has highest energy. 

Explanation

The transformer work only on an AC supply

because A transformer needs an alternating current that will create a changing magnetic field

note:

The transformer does not work on DC.

Direct current doesn't have a variable magnetic field

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ND17-1-2023

Explanation

Oxygen is the most abundant element contained within living organisms

Oxygen composes about 65% of the whole-body mass

while 

Calcium is the most abundant mineral in the human body,

calcium makes up 1.5 to 2% of the total body weight.

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ND17-1-2023