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2 years ago

Which wavelength of the electromagnetic spectrum are shorter than visible light and carry more energy

Physics

1 answer:

geniusboy [140]2 years ago

7 0

Answer:

Explanation:

Which wavelength of the electromagnetic spectrum are shorter than visible light and carry more energy

A micro

B radio

C ultraviolet

F infrared

The correct answer is C

The visible light wavelength is of 7 × 10^-7 m while the ultraviolet is of other

4 × 10^-8 m

Therefore, ultravolet is shorter than visible light and carry more energy

Therefore, the correct answer is option C.

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2 years ago

A 10-foot ladder is leaning straight up against a wall when a person begins pulling the base of the ladder away from the wall at

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$y = 4.36$

Explanation:

Let the height of the ladder be L

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Also:

Let $x = distance\ from\ the\ base\ of\ the\ ladder$

Let $y = height\ of\ the\ base\ of\ the\ ladder$

When the ladder leans against the wall, it forms a triangle and the length of the ladder forms the hypotenuse.

So, we have:

$L^2 = x^2 + y^2$ --- Pythagoras Theorem

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$x = 9$

Substitute 9 for x and 10 for L in $L^2 = x^2 + y^2$

$10^2 = 9^2 + y^2$

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Make $y^2$ the subject

$y^2 = 100 - 81$

$y^2 = 19$

Make y the subject

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Hence, the true distance at that point is approximately 4.36ft

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3 years ago

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