Explanation

Explanation

According to the law of universal gravitation:

F ∝ (m1 × m2) / r^2

Initially, F0 ∝ (m × m) / r^2

After doubling the mass and halving the distance:

F_new ∝ (2m × 2m) / (r/2)^2

= 16 × F0

Explanation

• A, D, E, and K are fat-soluble vitamins.
• Fat-soluble vitamins are absorbed by the body along with dietary fats.
• They are present in foods that contain fats.
• The body stores these vitamins in the liver and fat tissue when they are not in use. 
• Megadoses of fat-soluble vitamins can be toxic.

Explanation

CNG and Sui Gas have the same composition, primarily methane (CH₄).

Both are used as fuel for heating and vehicles.

It is used as a cleaner alternative to petrol and diesel in vehicles.

Explanation

Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus.

The virus spreads from person to person

and can infect a person's spinal cord, causing paralysis (can't move parts of the body).

***

The Polio vaccine was invented by___?

 Jonas Salk

Which country launched a polio vaccine drive after 1988 in April 2022?

 Israel

Explanation

Herbivore: Cow

Herbivores are animals that primarily feed on plants and plant-based materials.

Carnivore: Cat

Carnivores are animals that primarily feed on meat and animal tissue.

Omnivore: Dog

Omnivores are animals that feed on both plant and animal matter.

Explanation

A contagious disease spreads through direct or indirect contact with an infected person.

communicable diseases spread

Direct contact: Touching, sexual intercourse, or contact with bodily fluids from an infected person. 

Indirect contact:

Airborne: Breathing in germ-containing air after an infected person coughs or sneezes. 

Contaminated objects: Touching surfaces that have been contaminated by the pathogen. 

Contaminated food and water: Consuming food or water that contains disease-causing microorganisms. 

Vectors: Transmission by insects like mosquitoes or ticks. 

Examples of communicable diseases 

Bacterial: Tuberculosis, Salmonella, E. coli

Viral: Dengue, HIV, Ebola virus

Fungal: Ringworm, tinea

Parasitic: Malaria

Explanation

The first product from the oxidation of a primary alcohol is an aldehyde.

1. Initial oxidation:

The primary alcohol is oxidized by the removal of two hydrogen atoms, resulting in the formation of an aldehyde functional group (-CHO). 

2. Further oxidation:

The resulting aldehyde can then be further oxidized to a carboxylic acid functional group (-COOH) by the addition of a second oxygen atom. 

Explanation

• When DNA is transcribed into RNA, the base Thymine (T) is replaced by Uracil (U).
• So, the RNA sequence corresponding to the DNA sequence TAGC would be AUCG.

Explanation

- Lyman Series:  

  Electron transitions from higher energy levels (n ≥ 2) to n = 1.

- Since these transitions release high-energy photons, they fall in the ultraviolet range of the electromagnetic spectrum.

- Example transitions:  

  - n = 2 → 1  

  - n = 3 → 1  

  - etc.