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3 years ago

Which statement correctly compares infrared light to ultraviolet light

Physics

2 answers:

allochka39001 [22]3 years ago

8 0

I am fairly certain it's D. Good luck!

tino4ka555 [31]3 years ago

8 0

The correct answer is D. Infrared light has a lower frequency and a longer wavelength than ultraviolet light. Infrared and ultraviolet light are both electromagnetic waves which are waves that have electric and magnetic fields and can propagate without a medium. The electromagnetic spectrum, which shows the arrangement of e.m. waves in order of wavelength and frequency shows infrared light having a lower frequency and longer wavelength than ultraviolet light.

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eimsori [14]

answer is frequency

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Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 × 10-7 W/m2. Another

Tanya [424]

Answer: $I_2=0.618\times 10^{-7} W/m^2$

Explanation:

Given

Distance between source and receiver $d_1=3 m$

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Distance of of second observer $d_2=4 m$

Intensity varies as

$I\propto \frac{1}{d^2}$

using this

$I=\frac{k}{d^2}$

$\frac{I_1}{I_2}=\frac{d_2^2}{d_1^2}$

$\frac{1.1\times 10^{-7}}{I_2}=\frac{4^2}{3^2}$

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3 years ago

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Commercials for a toy bouncy ball advertise that it will bounce to a height that is greater than the

storchak [24]

Answer:

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4 years ago

Once again we have a skier on an inclined plane. The skier has mass M and starts from rest. Her speed at the bottom of the slope

mars1129 [50]

Answer:

v = 31.3 m / s

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The law of the conservation of stable energy that if there are no frictional forces mechanical energy is conserved throughout the point.

Let's look for mechanical energy at two points, the highest where the body is at rest and the lowest where at the bottom of the plane

Highest point

Em₀ = U = m g y

Lowest point

$Em_{f}$ = K = ½ m v²

As there is no friction, mechanical energy is conserved

Em₀ = $Em_{f}$

m g y = ½ m v²

v = √ 2 g y

Where we can use trigonometry to find and

sin 30 = y / L

y = L sin 30

Let's replace

v = RA (2 g L sin 30)

Let's calculate

v = RA (2 9.8 100.0 sin30)

v = 31.3 m / s

4 0

3 years ago