Explanation

• A closed circuit provides a complete path for the current to flow through.
• It allowing electricity to flow from the power source, through the wire, and back to the power source.

Explanation

• An open circuit is an electrical circuit that is broken or disconnected, and electricity cannot flow.
• When the wire is disconnected, the circuit is open, and the bulb is off.

Explanation

• A close circuit, also known as a closed circuit.
• It is an electrical circuit that is complete and allows electricity to flow from the power source, through the wire, and to the bulb, causing it to light up.

Explanation

• Insulators are materials that resist the flow of electricity, such as rubber, glass, wood, and plastic.
• They have a high resistance to electric current and are used to prevent the flow of electricity.

Explanation

• A thermal conductor is a material that allows heat energy to flow through it easily.
• Such as metals like copper, aluminum, and iron.

Explanation

• Conductors are materials that allow electricity to flow through them, such as copper, aluminum, and gold.
• They have a high concentration of free electrons, which are able to move freely within the material, carrying electrical charge with them.

Explanation

According to the World Health Organization (WHO), the industrial limit of sound in industries must be 75 dB (Decibels).

Explanation

Decibels (dB) are the units used to measure the loudness or intensity of sound.

Explanation

• Sounds travel faster through solids than through both gases and liquids.
• Solids have a more rigid structure, allowing sound waves to propagate more efficiently and at a faster speed.

Here's a comparison of sound speeds in different materials:

• Solids (e.g., steel): up to 5,960 m/s (13,140 ft/s)
• Liquids (e.g., water): up to 1,482 m/s (4,862 ft/s)
• Gases (e.g., air): approximately 343 m/s (1,125 ft/s)

Explanation

• Sound travels through a physical medium, such as air, water, or solid objects.
• It is transmitted through the vibration of particles in the medium.