Explanation

• Geostationary satellites are located directly above the equator. 
• Altitude: About 35,786 kilometers (22,236 miles) above sea level.
• Speed and Direction: Moves from west to east, matching the Earth's rotation speed.
• Time Period: Exactly 24 hours (one rotation day). 

Last updated 26-07-2026 by NA

Explanation

• A vegan avoids animal products, including meat, dairy, eggs, and often other animal-derived products.

Additional information 

• Vegetarian: Does not eat meat, but may eat dairy and eggs.
• Carnivore: Eats only meat.
• Omnivore: Eats both plants and meat. 

Last updated 26-07-2026 by NA

Explanation

• A Pycnocline is an ocean layer where water density changes rapidly with depth.
• Density changes mainly due to variations in temperature and salinity.
• It acts as a barrier that limits the mixing of surface and deep waters.

Additional information:

• Thermocline: Rapid change in temperature
• Halocline: Rapid change in salinity

Last verified on 26-07-2026

Explanation

• Sunlight travels at the speed of light (~3 × 10⁸ m/s).
• Takes 8 minutes 20 seconds on average to reach Earth.
• Sunlight takes approximately 499 seconds to travel from the Sun to Earth.
• Distance traveled: 150 million km from Sun to Earth.
• Moonlight takes only 1.3 seconds to reach Earth.

Last verified on 13-03-2026

Explanation

• A rainbow is produced due to the dispersion of sunlight by water droplets in the atmosphere.
• White sunlight splits into seven colours when it passes through raindrops.
• The formation of a rainbow involves refraction, dispersion, and internal reflection.
• Dispersion is the phenomenon responsible for separating white light into its constituent colours.
• Rainbows are usually seen opposite the Sun after rainfall.

Last verified on 26-07-2026

Explanation

• Mathematics is widely known as the "Mother of All Sciences".
• Because it provides the foundation for scientific and technological disciplines.
• It is essential for physics, chemistry, engineering, economics, and computer science.
• Mathematical principles are used in measurement, calculations, modeling, and problem-solving.
• The word Mathematics comes from the Greek word "Mathema," meaning knowledge or learning.

Last verified on 26-07-2026

Explanation

• Blood pressure readings use two numbers: systolic (top) and diastolic (bottom).
• An ideal normal reading is less than 120/80 mm Hg.
• Cardiac output: More blood pumped by the heart → higher BP.
• Blood volume: Increased blood volume → increased BP.

Last updated 25-07-2026 by NA

Explanation

• EAX is a 32-bit register, meaning it can hold 4 bytes of data
• Its sub-parts:

• AX — the lower 2 bytes (16-bit)
• AH — the upper 1 byte (high byte of AX)
• AL — the lower 1 byte (low byte of AX)

Last updated 24-07-2026 by NA

Explanation

A commercial Polaroid — referring to the polarizing material/filter used in various commercial applications — can be called by any of these names:

• Polarizer — a general term for anything that polarizes light
• Polaroid filter — specifically referencing the Polaroid brand of polarizing filters
• Polarizing filter — a technical term describing the function (a filter that polarizes light)

Last updated 24-07-2026 by NA

Explanation

• For the point $(6,9)$:
• x2+y2=62+92=36+81=117
• Since $117>100$, the point (6,9) lies outside the circle.

Last updated 24-07-2026 by NA