Explanation

• Cumulonimbus clouds are tall, dense clouds associated with thunderstorms.
• They can produce hail, heavy rain, lightning, and strong winds.
• Hail forms when strong updrafts inside these storm clouds carry water droplets upward, where they freeze.

Last verified on 09-09-2026

Explanation

• ECG stands for Electrocardiogram.
• It is a test that records the electrical activity of the heart.
• It is commonly used to check heart rate and rhythm.

Last verified on 09-09-2026

Explanation

• A picosecond (ps) is equal to 10⁻¹² seconds.

Additional information:

• Millisecond = 10⁻³ second
• Microsecond = 10⁻⁶ second
• Nanosecond = 10⁻⁹ second

Last verified on 08-09-2026

Explanation

• Seismology is the study of earthquakes and seismic waves that move through and around the Earth.
• A seismologist is a scientist who studies earthquakes and seismic waves.

Last verified on 03-04-2026

Explanation

• Myopia (Nearsightedness) is an eye defect in which near objects are clear but distant objects appear blurred.
• It occurs when the image forms in front of the retina instead of on it.
• It is corrected by using a concave (diverging) lens.
• The concave lens helps to shift the image back onto the retina.

Last verified on 01-04-2026

Explanation

Uranus is the planet in our solar system that rotates on its side

• Rotates on its side (axial tilt ~98°), appearing to spin sideways
• 7th planet from the Sun
• 3rd-largest planet in the solar system
• Very cold and windy
• Has faint rings and more than two dozen small moons

Last updated by NS on 06-09-2026​

Explanation

• Red blood cells lack a nucleus to maximize space for hemoglobin, which carries oxygen.
• More hemoglobin means more oxygen transport.
• This makes RBCs highly efficient for gas exchange.
• Lack of nucleus also gives them a flexible shape.
• This helps them pass through narrow blood capillaries.

Last verified on 14-06-2026

Explanation

• Marie Curie is the only person to win Nobel Prizes in two different natural sciences.
• She won the Nobel Prize in Physics in 1903.
• She won the Nobel Prize in Chemistry in 1911.
• She was awarded for her pioneering work on radioactivity.

Last verified on 06-09-2026

Explanation

To convert Celsius to Kelvin, use: K = °C + 273

• Given temperature = 37°C
• 37 + 273 = 310 K

Additional information:

• 0°C = 273 K
• 100°C = 373 K

Last verified on 06-09-2026

Explanation

• A tendon is not a bone; it is a strong connective tissue that connects muscles to bones.
• Tibia is the main bone of the lower leg.
• Femur is the thigh bone and the longest bone in the human body.
• Humerus is the bone of the upper arm.

Last verified on 06-09-2026