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erik [133]
4 years ago
12

Based on the table and your knowledge of waves, what can you conclude about the wavelength of mechanical waves compared to elect

romagnetic waves?
A) Mechanical waves have greater amplitude.
B) Mechanical waves tend to have longer wavelengths.
C) Mechanical waves tend to have shorter wavelengths.
D) Mechanical waves travel faster than electromagnetic waves.
Physics
2 answers:
Setler79 [48]4 years ago
6 0

Answer:

b

Explanation:

Kazeer [188]4 years ago
5 0

Answer:

The correct answer is option B) Mechanical waves tend to have longer wavelengths.

Explanation:

Before we begin, let's clarify what these two types of waves are.

Both electromagnetic waves and mechanical waves are classified by their ability to transmit energy in empty space.

<u>Electromagnetic waves are capable of doing that, but mechanical waves are not.</u>

The light waves that reach our planet are an example of electromagnetic waves.

On the other hand, mechanical waves need a medium to be able to move energy, it is not the same as with electromagnetic waves that are capable of transporting it on their own.

An example of a mechanical wave is sound. Sound is not capable of traveling in empty space.

This leads us to the conclusion that Mechanical waves tend to have longer wavelengths.

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A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 3.5 m&gt;s. Two seconds later
ivanzaharov [21]

Answer:

4.28 s

Explanation:

after two seconds (2 s) His friends is

d = 3.5 m/s x 2 s = 7 meter ahead.

in this state, a bicylist start from initial velocity vo = 0 m/s and accelerat 2.4 m/s²

then, when bicylist reach his friend

t friend = t bicyclist = t

d bicylist = d friend + d

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d friend = 3.5 . t

d bicylist = vo . t + ½ a t²

d friend + d = vo . t + ½ a t²

3.5 t + 7 = 0 . t + ½ . 2.4 . t²

3.5 t + 7 = 1.2 t²

0 = 1.2 t² - 3.5 t - 7

t = -1.363 and t = 4.28

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6 0
3 years ago
The Moon orbits the Earth in an approximately circular path. The position of the moon as a function of time is given by: x(t) =
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Answer: Average Velocity = - 643.42 i + 512.66 j m/s

Magnitude = 822.7 m/s

Direction = 141.45°

Explanation:

r = 3.84 x 10^8 m

w = 2.46 x 10^-6 rad/s

Formula for Average velocity = displacement / time

at t = 0

x(0) = r

y(0) = 0

at t = 8.45 days

= 8.45 x 24 x 3600 s =730080 sec

w t = 2.46 x 10^-6 x 730080 = 1.80 rad Or 102.90°

xf = r cos(w t) = - 0.2233r

yf = r sin(w t) = 0.9747r

Displacement = (xf - x0)i + (yf - y0)j = -1.2233r i + 0.9747r j

<v> = dispalcement / t = (-1.2233r i + 0.9747r j ) / (730080 s )

= - 643.42 i + 512.66 j m/s

Magnitude

= sqrt(643.42^2 + 512.66^2)

= 822.7 m/s

Direction

= 180 - tan^-1(512.66 / 643.42)

= 141.45°

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This formation model accounts for the formation of the inner planets made of of dense material such as iron. These planets include Mercury, venus, earth etc.

As the gravity pulls in the more dense material, the less dense material such as ice, liquid and gas colect together to form the outer planets, which include Jupiter, Uranus, etc.

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