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Lunna [17]
3 years ago
10

A wave is moving at the rate of 40 cm/s. Its wavelength is 8 cm. What is the frequency of the wave?

Physics
1 answer:
IgorC [24]3 years ago
5 0
Speed = frequency times wavelength.
40=8xf
f = 5 Hz or cycles per second.
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The solid right-circular cylinder of mass 500 kg is set into torque-free motion with its symmetry axis initially aligned with th
aivan3 [116]

Answer:

30.95°

Explanation:

We need to define the moment of inertia of cylinder but in terms of mass, that equation say,

A=\frac{1}{12}m(3r^2+l^2)

Replacing the values we have,

A=\frac{1}{12}(500)(3(0.5)^2+(2)^2)A=197.9kg.m^2

At the same time we can calculate the mass moment of intertia of cylinder but in an axial way, that is,

c=\frac{1}{2}mr^2

c=\frac{1}{2}(500)(0.5)^2

c=62.5kg.m^2

Finally we need to find the required angle between the fixed line a-a (I attached an image )

\Phi = 2tan^{-1}\sqrt{\frac{(\frac{A}{cos\gamma})^2-A^2}{c^2}}

Replacing the values that we have,

\Phi = 2tan^{-1}\sqrt{\frac{(\frac{197.9}{cos5\°})^2-197.9^2}{62.5^2}}

\Phi = 2tan^{-1}(\sqrt{0.076634})

\Phi = 2tan^{-1}(0.2768)

\Phi = 2(15.47)

\Phi = 30.95\°

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4 years ago
PHYSICS 50 POINTS PLEASE HELP
babymother [125]

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Newton was the first to see that such apparently diverse phenomena as a satellite moving near the Earth's surface and the planets orbiting the Sun operate by the same principle: Force equals mass multiplied by acceleration, or F=ma.

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3 years ago
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konstantin123 [22]

Answer:

Planets are bodies of rock or gas that are named after ancient gods.

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Explanation:

The planets and other stars in our solar system were similarly baptized. The planets were named after ancient gods. Other stars were baptized with names chosen by scientists or according to their peculiarity. Most of the planets were baptized by ancient Chinese astronomers, and later, by Babylonians. But over time different civilizations changed the names of the planets.

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The terrestrial planets are the most similar to the earth. These planets are those formed mainly by rocks and metals, have a solid surface without the incidence of rings, as is the case with Mercury, Venus and Mars.

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vladimir1956 [14]
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With regard to the factors contributing to the rise in the general price-level, one may mention that on the demand side the following factors have operated: rapid growth of population, increase in incomes, rising non-development expenditure of the government and increase in money supply.
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3 years ago
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