Explanation

Short-sightedness is caused due to elongation of the eyeball

 It also may result when the curve of the cornea is too steep. 

The messages sent from the retina to the brain are perceived as blurry

Explanation

Photophobia refers to an extreme sensitivity or fear of light.

It often causing discomfort or pain in the eyes.

Explanation

Platelets (a type of blood cell) and proteins in your plasma (the liquid part of the blood) work together to stop the bleeding by forming a clot over the injury. 

Vitamin K helps to make various proteins that are needed for blood clotting and the building of bones.

Explanation

HCl creates an acidic environment (pH 1.5 to 3.5) that activates the enzyme pepsin from its inactive form, pepsinogen.

Pepsin then breaks down proteins into smaller peptides, facilitating digestion.

Explanation

Explanation

Lead is commonly used in lead-acid batteries, which are widely used in automotive applications and for backup power systems.

Lead-acid batteries are known for their reliability and relatively low cost. 

Explanation

Explanation

Venus has a thick atmosphere primarily composed of carbon dioxide, with clouds of sulfuric acid

• Venus is the brightest planet.
• It has an atmosphere but no moons.
• It's identical in size, chemistry and gravity.
• It has volcanoes, mountains and sand.
• It's also called Sister Planet of the Earth.

Explanation

• The speed of sound in air at sea level and 20°C (68°F) is approximately 343 meters per second.
  

The speeds of sound in different materials:

• Air: 343 m/s
• Water: 1433 m/s
• Wood: 3300-3600 m/s
• Brick: 4176 m/s
• Steel: 6100 m/s
• Diamond: 12000 m/s

Explanation

White clothes reflect most of the sunlight, which helps keep the body cooler compared to darker clothes, which absorb more heat.