Explanation

• The unit of pressure is N/m² (Newton per square meter).
• It is also called Pascal (Pa).
• Pressure means force applied per unit area.
• Higher force or smaller area increases pressure.

Last verified on 17-06-2026

Explanation

• Ophthalmology is the study and medical specialty concerned with the eyes and vision.
• It deals with the structure, function, diseases, and treatment of the eyes.
• A doctor specializing in this field is called an ophthalmologist.
• Common eye conditions include cataracts, glaucoma, and refractive errors.

Last verified on 08-08-2026

Explanation

Isaac Newton formulated the law of universal gravitation, explaining how gravity works.

He famously described gravity after observing an apple fall from a tree.

Explanation

Antoine Henri Becquerel was an engineer, physicist, Nobel laureate,

First person to discover evidence of radioactivity.

 He belonged to France.

Explanation

• Urine is produced in the kidneys by filtering the blood.
• The kidneys remove excess water, salts, and waste products from the blood.
• Urine is formed in tiny filtering units called nephrons.
• After formation, urine passes through the ureters to the urinary bladder.
• The kidneys help maintain the body's fluid and electrolyte balance.

Last verified on 04-08-2026