Explanation

The mantle is crucial as it plays a key role in geological processes a such as plate tectonics, which affect earthquakes, volcanoes, and the formation of mountain ranges.

The structure of the earth is divided into four major components:

1. the crust,
2. the mantle,
3. the outer core,
4. the inner core.

Explanation

A residual-current device (RCD) is widely used in electrical circuits for shock safety.

It detects leakage currents and disconnects the circuit to prevent electric shocks.

Explanation

Materials that block the flow of electrons are called insulators.

They have high resistance and prevent electrical current from flowing through them.

Such as rubber or glass.

Explanation

Pressure exerted by the material on a smooth surface is not a factor affecting the resistance of a material.

The resistance is influenced by the type of material, temperature, and cross-sectional area.

Explanation

According to the International Astronomical Union, Pluto is still not an official planet in our solar system.

Pluto was first discovered by a young research assistant Clyde Tombaugh in 1930.

Pluto was demoted to dwarf planet status in 2006.

Additional Information

These are the 8 planets

1. Mercury

2. Venus

3. Earth

4. Mars

5. Jupiter

6. Saturn

7. Uranus

8. Neptune

Explanation

A sound wave is a form of mechanical energy.

Sound energy is the energy released by an objects vibrations.

Explanation

• R-600a (Isobutane): Most common in modern, energy-efficient household refrigerators.
• R-134a (Tetrafluoroethane): Widely used in previous decades and still common in light refrigeration.
• R-290 (Propane): Used in some eco-friendly cooling units.
• Ammonia (NH3): Used mainly in industrial or large-scale commercial refrigeration

Last updated question by NA on 28 April 2026

Explanation

The lithosphere is a rigid, rocky outer layer of the Earth.

It consisting of the crust and the solid outermost layer of the upper mantle.

It extends to a depth of about 60 miles (100 km).

Explanation

• A photometer is an instrument used to measure the intensity of light.
• It typically in units of luminous flux (lm) or illuminance (lux).
• It is commonly used in various fields such as photography, lighting design, and scientific research to quantify light levels.

Explanation

• identify the disease that is liable to be transmitted to the people by the environment is called infectious
• ***
• Communicable diseases are caused by infectious agents that can be transmitted to other people
  

AGM 02.05.2023