MCQs

Explanation
The speed of sound in air at sea level and 20°C (68°F) is approximately 343 meters per second . The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
Sound travels slowest in air , with a speed of approximately 343 meters per second (m/s) at 20°C. This is because air is a gas and has a low density and stiffness , which allows sound waves to propagate more slowly through the material. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The velocity of a wave (v) is equal to the product of its wavelength (λ) and frequency (f). This is expressed mathematically as: v = λf

Explanation
Dogs can hear sounds in the range of 67 Hz to 45,000 Hz , which is slightly higher than the human audible range.

Explanation
Whales have a unique audible range that is adapted to their underwater environment. They can hear sounds at very low frequencies , often below 20 Hz, and up to 31 kHz.

Explanation
Elephants can hear sounds in the range of 16 Hz to 20,000 Hz.

Explanation
Echoes are repeating sounds that are reflected back to the listener after the original sound has stopped. They are a result of sound waves bouncing off a surface and returning to the listener , creating a repeated or echoic effect.

Explanation
The speed of sound in diamond is approximately 12,000 meters per second (m/s). It is one of the fastest speeds of sound among all materials. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The speed of sound in air at sea level and 20°C (68°F) is approximately 343 meters per second . The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
Sound travels slowest in air , with a speed of approximately 343 meters per second (m/s) at 20°C. This is because air is a gas and has a low density and stiffness , which allows sound waves to propagate more slowly through the material. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The velocity of a wave (v) is equal to the product of its wavelength (λ) and frequency (f). This is expressed mathematically as: v = λf

Explanation
Frequency is the number of vibrations or oscillations produced by a vibrating body in one second. It's measured in Hertz (Hz) , where 1 Hz equals one vibration per second.

Explanation
Decibel (dB) is the unit used to measure sound intensity. Which is related to the amplitude of a sound wave. The amplitude of a sound wave determines the loudness of the sound One decibel (0.1 bel) equals 10 times the common logarithm of the power ratio.

Explanation
Dogs can hear sounds in the range of 67 Hz to 45,000 Hz , which is slightly higher than the human audible range.

Explanation
Whales have a unique audible range that is adapted to their underwater environment. They can hear sounds at very low frequencies , often below 20 Hz, and up to 31 kHz.

Explanation
Elephants can hear sounds in the range of 16 Hz to 20,000 Hz.

Explanation
Echoes are repeating sounds that are reflected back to the listener after the original sound has stopped. They are a result of sound waves bouncing off a surface and returning to the listener , creating a repeated or echoic effect.

Explanation
The speed of sound in diamond is approximately 12,000 meters per second (m/s). It is one of the fastest speeds of sound among all materials. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The speed of sound in air at sea level and 20°C (68°F) is approximately 343 meters per second . The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
Sound travels slowest in air , with a speed of approximately 343 meters per second (m/s) at 20°C. This is because air is a gas and has a low density and stiffness , which allows sound waves to propagate more slowly through the material. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The velocity of a wave (v) is equal to the product of its wavelength (λ) and frequency (f). This is expressed mathematically as: v = λf

Explanation
Frequency is the number of vibrations or oscillations produced by a vibrating body in one second. It's measured in Hertz (Hz) , where 1 Hz equals one vibration per second.

Explanation
Decibel (dB) is the unit used to measure sound intensity. Which is related to the amplitude of a sound wave. The amplitude of a sound wave determines the loudness of the sound One decibel (0.1 bel) equals 10 times the common logarithm of the power ratio.

Explanation
Dogs can hear sounds in the range of 67 Hz to 45,000 Hz , which is slightly higher than the human audible range.

Explanation
Dogs can hear sounds in the range of 67 Hz to 45,000 Hz , which is slightly higher than the human audible range.

Explanation
Whales have a unique audible range that is adapted to their underwater environment. They can hear sounds at very low frequencies , often below 20 Hz, and up to 31 kHz.

Explanation
Elephants can hear sounds in the range of 16 Hz to 20,000 Hz.

Explanation
Echoes are repeating sounds that are reflected back to the listener after the original sound has stopped. They are a result of sound waves bouncing off a surface and returning to the listener , creating a repeated or echoic effect.

Explanation
The speed of sound in diamond is approximately 12,000 meters per second (m/s). It is one of the fastest speeds of sound among all materials. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The speed of sound in air at sea level and 20°C (68°F) is approximately 343 meters per second . The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
Sound travels slowest in air , with a speed of approximately 343 meters per second (m/s) at 20°C. This is because air is a gas and has a low density and stiffness , which allows sound waves to propagate more slowly through the material. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The velocity of a wave (v) is equal to the product of its wavelength (λ) and frequency (f). This is expressed mathematically as: v = λf

Explanation
Frequency is the number of vibrations or oscillations produced by a vibrating body in one second. It's measured in Hertz (Hz) , where 1 Hz equals one vibration per second.

Explanation
Decibel (dB) is the unit used to measure sound intensity. Which is related to the amplitude of a sound wave. The amplitude of a sound wave determines the loudness of the sound One decibel (0.1 bel) equals 10 times the common logarithm of the power ratio.

Explanation
Dogs can hear sounds in the range of 67 Hz to 45,000 Hz , which is slightly higher than the human audible range.

Explanation
Whales have a unique audible range that is adapted to their underwater environment. They can hear sounds at very low frequencies , often below 20 Hz, and up to 31 kHz.

Explanation
Elephants can hear sounds in the range of 16 Hz to 20,000 Hz.

Explanation
Echoes are repeating sounds that are reflected back to the listener after the original sound has stopped. They are a result of sound waves bouncing off a surface and returning to the listener , creating a repeated or echoic effect.

Explanation
The speed of sound in diamond is approximately 12,000 meters per second (m/s). It is one of the fastest speeds of sound among all materials. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The speed of sound in air at sea level and 20°C (68°F) is approximately 343 meters per second . The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
Sound travels slowest in air , with a speed of approximately 343 meters per second (m/s) at 20°C. This is because air is a gas and has a low density and stiffness , which allows sound waves to propagate more slowly through the material. The speeds of sound in different materials: Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s

Explanation
The velocity of a wave (v) is equal to the product of its wavelength (λ) and frequency (f). This is expressed mathematically as: v = λf

Explanation
Frequency is the number of vibrations or oscillations produced by a vibrating body in one second. It's measured in Hertz (Hz) , where 1 Hz equals one vibration per second.

Explanation
Decibel (dB) is the unit used to measure sound intensity. Which is related to the amplitude of a sound wave. The amplitude of a sound wave determines the loudness of the sound One decibel (0.1 bel) equals 10 times the common logarithm of the power ratio.

Explanation
When light passes through a prism , refraction occurs, leading to the formation of a spectrum. Refraction is the bending of light as it passes through a medium with a different optical density. It causes the different wavelengths of light to separate and form a spectrum.

Explanation
Dispersion of light refers to the splitting of white light into its component colors, which are also known as the visible spectrum. This occurs when light passes through a medium with a refractive index that varies with wavelength, such as a prism.