Explanation

Acoustics is a branch of physics that deals with the study of sound and its behavior. 

Explanation

Explanation

The periodic table, also known as the periodic table of elements, is an organized arrangement of chemical elements into rows (periods) and columns (groups).

The periodic table shows trends in element properties, such as:

• Metallic character: Increases down a group and from right to left across a period.
• Nonmetallic character: Increases from the bottom left to the top right of the table.

Explanation

The Labrador Retriever, commonly known as the Labrador.

It is a popular breed of dog known for its friendly, outgoing, and loyal nature. 

Originally bred to assist fishermen in Newfoundland.

Labradors are now popular family pets and working dogs in various roles, such as guide dogs and search and rescue dogs.

Explanation

• Nitrogen (N2) makes up about 78% of the Earth's atmosphere.
• Making it the most abundant gas in the atmosphere.

Explanation

• Protein fibers like actin and myosin take part in muscle: Contraction
• ***
• Muscles are composed of two major protein filaments:
• a thick filament composed of the protein myosin and a thin filament composed of the protein actin.
• Muscle contraction occurs when these filaments slide over one another in a series of repetitive events.
  

Explanation

 Pellagra:

Cause: Lack of niacin (vitamin B3)

Skin symptoms: Inflamed skin, especially in areas exposed to sunlight or friction

Other symptoms: Diarrhea, dementia 

Explanation

• Given: Mass on Earth = 100 kg
• If an object has mass "m "on Earth, the mass would remain the same on the moon.
  • ​So the mass of the object on the moon is 100 kg.

Mistake Points

• The weight of the human on the moon will change and will be 1/6th of the weight on earth because of the moon's weak gravitational impact.
• Weight on Moon = (Mass on Earth) x 1/6
• Weight on Moon = 100 / 6 = 16.7 kg.

Explanation

Radiation was discovered by Henri Becquerel in 1896.

When he observed that uranium salts emitted rays that could fog photographic plates.

It leading to the study of radioactivity.

Explanation

Appendicitis is the inflammation of the appendix.

It is a small, tube-shaped organ attached to the large intestine in the lower right abdomen.

Appendicitis is a medical emergency that requires urgent treatment.