Tag: science & technology

Laughing involves multiple brain regions including emotional processing areas and motor control centers, requiring coordination of approximately 15-17 facial muscles. Option C correctly identifies 5 brain regions and 17 muscles as the closest approximation among the choices.

The blood vessels in the brain, including capillaries, arteries, and veins, if stretched out end-to-end, would span approximately 100,000 miles. This extensive network ensures oxygen and nutrients reach all parts of the brain. Option A is the correct order of magnitude.

One nanometer equals 10^-9 meters, or one billionth of a meter. This is a standard metric prefix conversion where 'nano' means 10^-9. This makes option C correct.

Mica transfers heat efficiently from the heating element while blocking electric current. This dual property makes it ideal for isolating the heating component electrically while conducting thermal energy to the surface.

Rainbow formation requires three optical processes: refraction when sunlight enters the water droplet, internal reflection off the droplet's back surface, and refraction again when exiting. Dispersion during refraction separates white light into colors.

Planets do not generate their own light - they shine only by reflecting sunlight. Unlike stars (luminous bodies that produce energy through fusion), planets are non-luminous celestial bodies orbiting stars.

A solar eclipse occurs when the Moon passes directly between the Sun and Earth, blocking sunlight from reaching Earth's surface. This alignment creates the Moon's shadow on our planet.