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3 years ago

How will sunlight most likely affect a black shirt on a hot summer day?

Physics

2 answers:

Dmitriy789 [7]3 years ago

5 0

<span>The temperature of the shirt will increase because all wavelengths of light are absorbed by the shirt.

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Novosadov [1.4K]3 years ago

3 0

It will make the shirt very hot because the color black absorbs all colors of the color spectrum. So never war a black shirt on a sunny day.<span />

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Scientific theories are explanations for naturally occurring events or phenomena. Although scientific theories require extensive

Arada [10]

The answer should be B) Scientific theories and laws develop from the acquisition of scientific knowledge. Hope this helps you.

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3 years ago

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How do noise canceling headphones work?

postnew [5]

Answer:

B.) by interfering with sound waves

Explanation:

As we know that the interference of sound waves is of two types

1). constructive interference

2). destructive interference

now we know that constructive interference means the resultant intensity will be more than the intensity of interfering waves as here two waves are in same phase.

In destructive interference the resultant of two waves is given by the minimum resultant of the intensity as here the phase of two waves are opposite to each other.

So we will say that

$I = \sqrt{(I_1 + I_2 + 2\sqrt{I_1I_2}cos\theta)}$

here in case of noise cancelling headphones we know that the phase of noise is always made in opposite phase with the sound which is used to cancelled the noise.

This will reduce the noise and we will get a clear sound

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3 years ago

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A pulse traveled the length of a stretched spring the pulse transferred...A)energy only B)mass only C)both energy and mass D) ne

xz_007 [3.2K]

Answer:

Explanation:

So a pulse is a part of a mechanical wave, and mechanical waves are energy transfer trough some medium, in this case a stretched spring. So the correct answer is (A) energy only. The pulse cant be transferred into mass.

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3 years ago

Name the two ends of a magnet

astra-53 [7]

The positive and the negative side
I hope this helps :)

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3 years ago

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An object is 30 cm in front of a converging lens with a focal length of 10 cm. Use ray tracing to determine the location of the

poizon [28]

Answer:

Inverted

Real

Explanation:

u = Object distance = 30 cm

v = Image distance

f = Focal length = 10 cm

Lens Equation

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}-\frac{1}{u}=\frac{1}{v}\\\Rightarrow \frac{1}{v}=\frac{1}{10}-\frac{1}{30}\\\Rightarrow \frac{1}{v}=\frac{1}{15}\\\Rightarrow v=15\ cm$

As, the image distance is positive the image is real and forms on the other side of the lens

$m=-\frac{v}{u}\\\Rightarrow m=-\frac{-15}{30}\\\Rightarrow m=-0.5$

As, the magnification is negative the image is inverted

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3 years ago