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3 years ago

9

When the temperature of air increases the wave length of a sound wave

1 answer:

solmaris [256]3 years ago

6 0

If temperature T increases , speed of sound v also increases , now by , λ=v/f , as v increases , λ (wavelength) will increase . Frequency is characterised by the source of sound hence it is not affected by temperature , and as T=1/f , so time period also doesn't change.

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An what would be needed to change an objects state of motion

VladimirAG [237]

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3 years ago

What speed would a proton need to achieve in order to circle Earth 1790 km above the magnetic equator, where the Earth's mag- ne

irinina [24]

Answer:

The velocity is 31.25 m/s and direction is toward west.

Explanation:

Given that,

Distance $h= 1790 km = 1.790\times10^{6}\ m$

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Mass of proton $m=1.673\times10^{-21}\ Kg$

Radius of earth $R =6.38\times10^{6}\ m$

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$v=\dfrac{Bqr}{m}$

Put the value into the formula

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3 years ago

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Sonja [21]

Answer: Not 100% sure but I think it’s C.

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3 years ago

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3 years ago

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nikklg [1K]

Answer:

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First, we need to calculate linear expansivity, then after finding that value, we can move on to finding the area expansivity.

<u />

=============================================================

Finding Linear Expansivity :

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⇒ α = 9 - 4 / (4 × 70 - 20)

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============================================================

Finding Area Expansivity :

⇒ Area Expansivity = 2 × Linear Expansivity

⇒ β = 2 × α

⇒ β = 2 × 0.02

⇒ β = <u>0.04 °C⁻¹</u>

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1 year ago

Read 2 more answers