3 years ago

The amount of _____ that occurs when a sound wave encounters a barrier depends on the wave's wavelength.

Physics

1 answer:

Anna11 [10]3 years ago

6 0

Answer:

i think it is waves

Explanation:

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if a cyclist is travelling a road due east at 12km/h and a wind is blowing from south-west at 5km/h. find the velocity of the wi

slamgirl [31]

Answer:

The velocity of wind with respect to cyclist is $-15.5 \widehat{i} - 3.5 \widehat{j}$ .

Explanation:

speed of cyclist = 12 km/h east

speed of wind = 5 km/h south west

Write the speeds in the vector form

$\overrightarrow{vc} = 12 \widehat{i}\\\\overrightarrow{vw} = - 5 (cos 45 \widehat{i} + sin 45 \widehat{j})\\\\\overrightarrow{vw} =-3.5 \widehat{i} - 3.5 \widehat{j}$

The velocity of wind with respect to cyclist is

$\overrightarrow{vw} =-3.5 \widehat{i} - 3.5 \widehat{j}\overrightarrow{v_(w/c)} = \overrightarrow{vw}-\overrightarrow{vc}\\\\\overrightarrow{v_(w/c)} = - 3.5 \widehat{i} - 3.5 \widehat{j} - 12 \widehat{i}\\\\\overrightarrow{v_(w/c)} =-15.5 \widehat{i} - 3.5 \widehat{j}$

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2 years ago

in a thermal power plant, heat from the flue gases is recovered in (A) chimney (B) de-super heater (C) economizer (D) condenser

Volgvan

Answer:

(A)chimney

Explanation:

bc all the smoke is going into the chimney

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3 years ago

A fisherman notices that wave crests pass the bow of his anchored boat every 5.0 s. He measures the distance between two crests

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Answer: |

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Explanation:

Haha. You FOOL. Unless you have bought the dumb brainly plus you had to watch an AD for NO ANSWER.

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3 years ago

Astronomers have divided the planets into two groups. The inner, “terrestrial,” planets are Mercury, Venus, Earth, and Mars. The

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Answer:

it's letter C because inner planets are warmer because they are close to the sun and they are smaller than the Jovian or Giant Gas Planets which have rings, and cooler.

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2 years ago

A ball is dropped from a height of 180m- Calculate the velocity of the ball when it strikes the ground

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Answer:

6s , 60mls

Explanation:

hope this helps love

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3 years ago

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