Question Discussion & Solution

The logic is:

In the first letter E is added six then we get K similarly in the second letter F is added six the

we get L.

Similarly, in the first letter T is added six then we get Z and in the second letter U is added six then we get A.

Concept:

• Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied force in the direction of the force.
•  \(F = \frac{{dp}}{{dt}} = \frac{d}{{dt}}\left( {mv} \right)\;\left( \because {p = mv} \right)\) 

i.e., Force = ma ⇒ Force (F) ∝ a

Where,

F = the force applied, m = the mass of the body, a = the acceleration produced. p = linear momentum, v = velocity of particle at some instance

Explanation:

Given that;

Mass = 100 kg

Acceleration (a) = 10 m/s2

External force on body (F) = ma = 100 × 10 = 1000 N

The correct answer is Rakesh Sharma.

Key Points

• Rakesh Sharma is the first Indian to enter space.
  • He was selected as a cosmonaut for a joint Soviet-Indian spaceflight in 1982.
  • He made history by becoming the first Indian to travel to space in 1984.
  • He flew on Soyuz T-11 with commander Yury Malyshev and flight engineer Gennady Strekalov, to the space station Salyut 7 on 3^rd April 1984.
  • Rakesh Sharma and his crewmates landed in Kazakhstan on 11^th April 1987 after the successful completion of the mission.
  • He is the only Indian citizen to travel in space.

Additional Information

• Kalpana Chawla was the first Indian-origin woman to enter space.
  • She was killed in the space shuttle Columbia disaster on 1st February 2003.
• Sunita Williams is the second Indian-origin woman to enter space.
  • The first marathon in space was run by Sunita Williams.
• Yuri Gagarin is the first man to enter space.
• Ravish Malhotra was an Air Force test pilot in India. 
  • He served as a backup for Rakesh Sharma on the Soyuz T-11 mission.

• The Hydrogen present in acids is responsible for their acidic behaviour.
• An acidic substance donates its H⁺ ions in aqueous solution which causes an imbalance of H⁺ and OH^- ions concentration and make the overall solution acidic.

Basic:

• The Hydroxide ions present in bases is responsible for their basic behaviour.
• A basic substance donates its OH^- ions in aqueous solution which causes an imbalance of H⁺ and OH^- ions concentration and makes the overall solution basic.

The correct answer is between 13 to 20 days.

Key Points

• The life span of the WBC is between 13 to 20 days. 
• The life span of the RBC is 20-120 days and it gets destroyed in the spleen area of the human body to recycle Iron content.
• The life span of the blood platelets is 3-5 days. 
• WBC's are mainly responsible for the protection of the body from diseases.

Additional Information

 Important Points

• WBCs are also called leukocytes or white corpuscles.
• The life span of WBCs is 13 to 20 days.
• Total WBCs count ranges from 4,500 to 10,000.
• WBCs are a cellular component of the blood that lacks hemoglobin, has a nucleus, is capable of mobility, and producing antibodies.
• They act as a " Soldier or Guard " of our body.
• The size of WBCs is 12 to 17 µm in Diameter and about three times RBCs.
• WBCs do not have any Fixed shape, it may be circular, rhomboid, or any other shape.