Explanation

Projectile motion plays a crucial role in the high jump, as the jumper's body follows a curved path after takeoff.

Speed and strength help generate the necessary force for a successful jump.

Explanation

Last updated question 25 feb 2026

Explanation

The renewable energy sources are:

• Water energy
• Wind energy
• Tidal energy
• Hydroelectric
• Ocean energy
• Geothermal energy
• Biomass
• Biogas

The non-renewable energy sources are:

• Fossil fuels or Hydrocarbon fuel (Oil, Natural gas, Coal)
• Nuclear energy

Explanation

When current flows through a bulb, electrical energy is converted into both heat and light energy.

The filament inside the bulb heats up due to resistance (Joule heating) and emits light as a result.

Explanation

Wave velocity is the distance a wave travels per second in a given medium.

It is calculated as Velocity (v) = Frequency (f) × Wavelength (λ).

Explanation

The Magellanic Clouds (Large and Small) are irregular galaxies near the Milky Way.

They lack a definite shape.

They are satellite galaxies of the Milky Way.

Explanation

The refractive index (n) is defined as:

n = Speed of light in air / Speed of light in medium

Given:

n = 1.5

Speed of light in air = 3 × 10⁸ m/s

Rearrange the formula to solve for Speed of light in glass:

Speed of light in glass = Speed of light in air / n

= (3 × 10⁸ m/s) / 1.5

= 2 × 10⁸ m/s

Explanation

Pigeons have a hearing range of approximately 45Hz to 7000Hz, allowing them to detect low-frequency sounds.

This ability helps them navigate and sense environmental changes, such as approaching storms.

Explanation

Space garments are designed with thermal insulation to regulate astronauts' body temperature.

They can reduce body heat loss by 40% to 60%, preventing extreme temperature fluctuations in space.

Explanation

Autorefractor is used to measure refractive errors in the eye.

Ophthalmic Tomography (OCT) helps detect cornea and lens obstructions.