3 years ago

How long does it take for the earth to rotate

Physics

2 answers:

zheka24 [161]3 years ago

6 0

It takes 24 hours to make a full rotation around the sun

GenaCL600 [577]3 years ago

5 0

It takes 24 hours to rotate around in a circle and 365 days to orbit around the sound cuz it takes 1 year to rotate around the sun and because it takes 1 day to rotate around in a circle.

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Which of the following is generally correct concerning the velocity and wavelength of waves in two different materials disturbed

Katarina [22]

Are you talking about a constructive force / constructive wave? Sorry I think that's what you are asking

7 0

3 years ago

A grandfather clock keeps time using a pendulum consisting of a light rod connected to a small heavy mass. With a rod of length

german

Answer:

The length of the rod should be

$\frac{L}{4} \\$

Explanation:

Period of simple pendulum is given by

$T=2\pi\sqrt{\frac{l}{g}} \\$

We have

$\frac{T_1^2}{T_2^2}=\frac{l_1}{l_2}\\\\\frac{2^2}{1^2}=\frac{L}{l_2}\\\\l_2=\frac{L}{4} \\$

The length of the rod should be

$\frac{L}{4} \\$

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3 years ago

Children are told to avoid standing too close to a rapidly moving train because they might get sucked under it. Is this possible

storchak [24]

Answer:

no its not like the undertow in the ocean

Explanation:

4 0

3 years ago

Which resource would be the best choice to learn more information about studying martial arts?

zhuklara [117]

Answer:

Dance studio

Explanation:

Martial art use to defend ourself from any dangerous. Dance is a way to learn it

3 0

3 years ago

The angular speed of digital video discs (DVDs) varies with whether the inner or outer part of the disc is being read. (CDs func

Kitty [74]

Answer:

α = 0.0135 rad/s²

Explanation:

given,

t = 133 min = 133 x 60 = 7980 s

angular speed varies from 570 rpm to 1600 rpm

now,

570 rpm = $570 \times \dfrac{2\pi}{60}$

= 59.69 rad/s

1600 rpm = = $570 \times \dfrac{2\pi}{60}$

= 167.6 rad/s

using equation of rotational motion

ωf = ωi + αt

167.6 = 59.7 + α x 7980

α x 7980 = 107.9

α = 0.0135 rad/s²

8 0

3 years ago