Question Discussion & Solution

Etymology is the study of origin of words; similarly Cosmology is study of origin of Universe.

Concept:

Newtons Third Law of Motion

• Every action has an equal and opposite reaction. Action and reaction forces act on different bodies. 

Explanation:

• Considering an example, A bullet is fired from a gun.
• The gun applies force to a bullet and the bullet applies force on the gun. 
• If we consider the gun as the only object, it gives recoil which is the reaction force applied by it on the bullet. 
• So action force is a force on bullet and reaction force is applied on the gun. 
• Both forces are not on the same object hence the action and reaction forces cannot balance each other. 

So, 'do not act on the same body.' is the correct option. 

The correct answer is Scatter plots.

Key Points

• Scatter plots
  • A correlation exists between two variables when one of them is related to the other in some way.
  • A scatterplot is the best place to start.
  • A scatterplot (or scatter diagram) is a graph of the paired (x, y) sample data with a horizontal x-axis and a vertical y-axis.
  • Each individual (x, y) pair is plotted as a single point.
  • Scatter plots are often used to find out if there's a relationship between variable X and Y. Hence, Option 2 is correct.
  • A scatterplot can identify several different types of relationships between two variables.
  • A relationship has no correlation when the points on a scatterplot do not show any pattern.
  • A relationship is non-linear when the points on a scatterplot follow a pattern but not a straight line.
  • A relationship is linear when the points on a scatterplot follow a somewhat straight line pattern. This is the relationship that we will examine.
• 

Additional Information

The Correct Answer is 24.

Key Points

• Human ribs are flat bones that form part of the rib cage to help protect internal organs.
• Humans usually have 24 ribs, in 12 pairs.
• The first seven pairs are attached directly to the sternum by costal cartilages and are called true ribs.
• The 8th, 9th, and 10th pairs are called false ribs, they do not join the sternum directly but are connected to the 7th rib by cartilage.

Additional Information 

• Human ribs are flat bones that form part of the rib cage to help protect internal organs.
• Humans usually have 24 ribs, in 12 pairs.
• Only 1 in 500 people have an extra rib known as a Cervical rib. 
• At the front of the body, most of the ribs are joined by costal cartilage to the sternum.
• Ribs connect to vertebrae at the costovertebral joints.

The correct answer is Folk Dance.

Key Points

• Dancer Kalbelia Gulabo Sapera's tale is one of perseverance in the face of societal pressure.
• Gulabo was awarded the Padma Shri in 2016 for his efforts to popularise Rajasthan's Sapera dance tradition, which he has promoted in over 165 countries.
• She was a participant in the recently concluded Jaipur Literature Festival 2021, a woman whose storey is worth hearing.
• Gulabo's indomitable spirit protected her from a destiny that regularly befalls girl children in the nomadic group of kalbelias, an abjectly poor population on the outskirts of civilization.

Important Points

• Kalbelia is a snake-charming tribe from Rajasthan, India's the Thar Desert.
• Men and women both do dance, which is an important element of their culture.
• The Daliwal and Mewara are the two main groups of Kalbelias. In ancient times, the Kalbelias were known to wander about a lot.
• Catching snakes and trading snake venom is their traditional occupation.