Explanation

• Communication satellites are used for telecommunication.
• Including telephone communication, internet connectivity, and television broadcasting, enabling global communication networks.

Explanation

Weather satellites are used to provide weather forecasting and monitoring of weather patterns, climate change.

Explanation

Earth observation satellites are primarily used for observing the Earth's surface, atmosphere, and oceans.

Explanation

• The three bones in the middle ear are the malleus (hammer), incus (anvil), and stapes (stirrup).
• The stapes, or stirrup, is the last bone in the chain and transmits sound vibrations to the inner ear.

Explanation

• Vibration refers to the rapid back and forth movement of an object, often in a repeating pattern.
• This can include motions like oscillations, shakes, or tremors.

Explanation

• When sound travels through air, the air particles vibrate back and forth along the direction of wave propagation.
• This means that the air particles oscillate in the same direction as the sound wave is traveling.
• It allowing the energy of the sound wave to be transmitted through the air.

Explanation

• When sound waves reach the ear drum, it vibrates and causes the small bones (ossicles) behind the eardrum to vibrate.
• These vibrations are then transmitted to the liquid in the inner ear (cochlea).
• Where they are detected by small hairs (hair cells) and converted into electrical signals that are sent to the brain via the auditory nerve.

Explanation

• The speed of sound in aluminium is approximately 6420 meters per second.
• It is significantly faster than the speed of sound in air due to aluminium's higher density and elastic properties.

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s

Explanation

• The speed of sound is maximum in gold, with a value of approximately 3240 meters per second (m/s).

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s

Explanation

• The speed of sound in aluminium is approximately 6420 meters per second.
• It is significantly faster than the speed of sound in air due to aluminium's higher density and elastic properties.

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s