Explanation

1 radian ≈ 57.3 degrees, based on the formula: 

1 radian = 180/𝜋 degrees.

It is a standard angular measurement in mathematics and physics.

Explanation

When a car moves at constant velocity, it means there is no acceleration.

According to Newton’s First Law, if there’s no acceleration, the net force acting on the object is zero.

Explanation

In electrical-mechanical analogies, mass (which resists acceleration) corresponds to inductance, which resists changes in current.

Just as mass stores mechanical energy, inductance stores magnetic energy.

Explanation

Dogs can hear a much wider range of frequencies than humans, typically from 50 Hz to 46,000 Hz.

Humans can generally hear sounds from 20 Hz to 20,000 Hz.

Explanation

• Luminous objects are those that emit light of their own.
• Such as the sun, stars, light/electric bulbs, glowsticks, torch, lamps, candle, fire flies, lantern fish and neon tube.
• They produce their own light through various processes like incandescence, fluorescence, or bioluminescence.

Explanation

All plants move Anticlockwise around Sun.

All plants move anticlockwise around their axis.

Earth rotates its axis from West to East.

Explanation

• The splitting of light into its constituent colors is known as dispersion.
• This occurs when white light passes through a prism or other medium, and the different wavelengths of light are refracted at slightly different angles, spreading out into a spectrum of colors.
• This is also known as chromatic dispersion.

Explanation

In the resistor color code, orange represents the digit 3.

This value is used in the first two bands (significant figures) or as the multiplier depending on the band position.

Explanation

MRI (Magnetic Resonance Imaging) uses a strong magnetic field and radio waves to create detailed images of organs and tissues.

It does not use ionizing radiation, unlike X-rays or CT scans.

Explanation

Infra-red waves are electromagnetic waves and do not require a medium to travel.

Mechanical waves like water, sound, and seismic waves need a medium (solid, liquid, or gas) to propagate.