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Lilit [14]
3 years ago
10

Do sound waves must have a medium to travel but elctromagnetic waves cannot

Physics
1 answer:
ra1l [238]3 years ago
4 0
No don't feel feel like they do
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You are designing a rotating metal flywheel that will be used to store energy. The flywheel is to be a uniform disk with radius
Gennadij [26K]

Answer:

t = 0.0735 m

Explanation:

Angular acceleration of the flywheel is given as

\alpha = 3 rad/s^2

now after t = 8 s the speed of the flywheel is given as

\omega = \alpha t

\omega = 3 \times 8

\omega = 24 rad/s

now rotational kinetic energy of the wheel is given as

K = \frac{1}{2}I\omega^2

K = \frac{1}{2}(\frac{1}{2}mR^2)(24^2)

800 = \frac{1}{4}m(0.23)^2(24^2)

m = 105 kg

now we have

m = \rho (\pi R^2) t

105 = 8600(\pi \times 0.23^2) t

t = 0.0735 m

4 0
3 years ago
Una grúa eleva un tubo de concreto de
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Explanation:

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3 years ago
Add a small ball to a graduated cylinder containing 10 milliliters of water.
malfutka [58]
The volume of water will increase . If yu subtract the original volume from the new volume of water you will get the volume of the small ball.
8 0
3 years ago
Which technological advance allows scientists to handle these objects enough to feel their properties while still protecting the
muminat
The answer depends heavily on what 'objects' you're talking about.
5 0
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Which types of electromagnetic waves have longer wavelengths than the waves that make up visible light? check all that apply. ra
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The order goes like this:
 
Radio, Micro waves, Infrared, Visible, UV (Ultra Violet), X-Ray, Gamma Ray. 
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