Question

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Answer 1

Answer:

5. amplitude determines loudness

frequency determines pitch

6.it will decrease . Earth's atmosphere traps heat from the sun and keep it near the surface warming the planet and sustaining life on earth

the greenhouse effect keeps the average surface temperature of the planet at around 15 degrees Celsius

7 . u could see the answer in the attachment

Answer 2

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$\huge\color{red}{Question\: 5:-}$

$\begin{gathered}\begin{gathered}: \implies \underline{ \boxed{\displaystyle \sf \bold{Part \: <strong><em><u>A</u></em></strong>}} }\\ \\\end{gathered}\end{gathered}$

$\sf\color{blue}{→Which\: wave\: property\: determines\: loudness\: ?}$

$\mathrm{\boxed{\boxed{\pink{→ Amplitude✔}}}}$

• Loudness depends on the amplitude,or height, of sound waves. The greater the amplitude, the louder the sound perceived.

$\sf\color{green}{→Amplitude\: is \:measured \:in \:decibels}$

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$\begin{gathered}\begin{gathered}: \implies \underline{ \boxed{\displaystyle \sf \bold{Part \: <strong><em><u>B</u></em></strong>}} }\\ \\\end{gathered}\end{gathered}$

$\sf\color{blue}{→Which\: wave\: property\: determines\: pitch\: ?}$

$\mathrm{\boxed{\boxed{\pink{→ Frequency✔}}}}$

• The frequency of a sound wave is what your ear understands as pitch. A higher frequency sound has a higher pitch, and a lower frequency sound has a lower pitch.

$\sf\color{green}{→Frequency\: is \:measured \:in \:Hertz}$

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$\huge\color{red}{Question\: 6:-}$

$\sf\color{green}{→The \: temperature \: will \: decrease}$

• Without atmosphere, earth will turn into a ball of ice. It's temperature will decreasedue to absence of green house gases which trap the sun's heat and keep the planet warm.

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$\huge\color{red}{Question\: 7:-}$

Frequency wavelength and wave velocity are related as follows:

• Wave length is the distance travelled by the wave during the time a particle of the medium completes one vibration.
• Therefore, if λ be the wavelength and T the time period then the wave travels a distance λ and time T

Hence,

$\begin{gathered}\begin{gathered}: \implies \underline{ \boxed{\displaystyle \sf \bold{Wave \: Velocity \: = \frac{Distance}{Time} }} }\\ \\\end{gathered}\end{gathered}$

$\mathrm{\boxed{\boxed{\green{→ Wave\: velocity= \:Frequency\: × \:Wavelength✔}}}}$

The wave velocity in a medium remains constant under the same physical condition.

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${\huge{\underline{\small{\mathbb{\blue{HOPE\:HELP\:U\:BUDDY :)}}}}}}$