Khaled said the North star is special because it appears all over the world and its changes position.

Physics

1 answer:

saw5 [17]3 years ago

3 0

False the North Star never changes it position

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Sally and Susie are astronauts. They went outside the space station to fix something.

rodikova [14]

Answer:

Because sound doesn't move in vacuum (of space)

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The evidence is overwhelming that the Grand Canyon was dug over a span of millions of years by the erosive power of the Colorado

Vesna [10]

Answer:

evolutionary theory

Explanation:

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When you stop at a railroad crossing at night, instead of correctly perceiving two red lights that flash alternately you may per

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I'm pretty sure that there should be an options to choose. Anyway, I've seen this question before and I know that this is an example of <span>the phi phenomenon.</span>

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3 years ago

Read 2 more answers

Master of physics needed

Delicious77 [7]

Hey JayDilla, I get 1/3. Here's how:
Kinetic energy due to linear motion is:
$E_{linear}= \frac{1}{2}mv^2$
where
$v=r \omega$
giving
$E_{linear}= \frac{1}{2}mr^2 \omega ^2$

The rotational part requires the moment of inertia of a solid cylinder
$I_{cyl} = \frac{1}{2}mr^2$
Then the rotational kinetic energy is
$E_{rot}= \frac{1}{2}I \omega ^2= \frac{1}{4}mr^2 \omega ^2$
Adding the two types of energy and factoring out common terms gives
$\frac{1}{2}mr^2 \omega ^2(1+ \frac{1}{2})$
Here the "1" in the parenthesis is due to linear motion and the "1/2" is due to the rotational part. Since this gives a total of 3/2 altogether, and the rotational part is due to a third of this (1/2), I say it's 1/3.

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4 years ago

What is the maximum value of the magnetic field at a distance of 2.5 m from a light bulb that radiates 100 W of single-frequency

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Answer:

$1.04\times 10^{-7}$ T