Explanation

Samuel Hahnemann

• Birth: 1755
• Death: 1843
• Country: Germany
• Principle: “Similia similibus curentur” (like cures like)
• Famous work: Organon of Medicine

Last verified on 30-03-2026

Explanation

• Cholera is an infectious disease caused by the bacterium Vibrio cholerae.
• Symptoms include severe diarrhea, dehydration, and vomiting.
• Cholera can be prevented by clean drinking water and proper sanitation.

• It mainly spreads through contaminated water and food.
  It is most common in areas with poor hygiene and overcrowding.

Last verified on 3-03-2026

Explanation

• Sirius means صبح کا ستارہ
• Sirius, also called the Dog Star.
• It is the brightest star in the night sky visible without a telescope.
• It is located in the constellation Canis Major.
• It is about 8.6 light-years from Earth.

Last verified on 19-03-2026

Explanation

• In liquids and gases, heat is mainly transferred by convection.
• Convection involves the movement of particles carrying heat from one place to another.
• Essential for weather patterns, ocean currents, and heating systems.

Last verified on 19-03-2026

Explanation

• Noise intensity is measured in decibels (dB).
• It indicates the loudness of sound.
• It helps assess noise pollution in cities, industries, and traffic areas.
• Noise pollution affects hearing, stress levels, and sleep.
• Reducing exposure above 85 dB is important for health protection.

Last verified on 19-03-2026

Explanation

• Sound waves in solvents (like liquids) travel as longitudinal waves, where particles vibrate parallel to the direction of wave propagation.
• These are a type of mechanical wave, requiring a medium to travel.

Last verified on 19-03-2026

Explanation

• Tritium, also known as superheavy hydrogen.
• It has 1 proton and 2 neutrons in its atomic nucleus.

Additional information:

• Protium (¹H) → 1 proton, 0 neutrons
• Deuterium (²H) → 1 proton, 1 neutron

Last verified on 19-03-2026

Explanation

The K orbit, also known as the first electron shell.

• It can hold a maximum of 2 electrons.

The L orbit, also known as the second electron shell.

• It can hold a maximum of 8 electrons.

The M orbit, also known as the third electron shell.

• It can hold a maximum of 18 electrons.

Last verified on 19-03-2026

Explanation

• The mass number (A) is the sum of protons and neutrons present in the nucleus of an atom.
• It is a measure of the total number of nucleons (protons and neutrons) in the nucleus.
• It helps determine the atomic mass and distinguishes isotopes of an element.

Last verified on 19-03-2026

Explanation

• Cat and Dog is/are a secondary consumer.
• Because they eats primary consumers (herbivores).
• Like mice, birds, and rabbits.

Last verified on 19-03-2026