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2 years ago

What can electromagnetic waves travel through?

Physics

1 answer:

Kisachek [45]2 years ago

6 0

Electromagnetic waves do not require a medium to travel through. They can travel through empty space or matter.

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PLS ANSWER FAST WILL GIVE BRAINLEST!!!

Burka [1]

Answer:

F = 6,000 N

Explanation:

F = m × a

F = 2,000 × 3

F = 6,000 kg m/s²

F = 6,000 N

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2 years ago

Jeremy is pushing his two children on a set of swings. He gives his daughter a push and she swings

nignag [31]

Jeremy’s son has more mass, so it would take more forever to reach the same height as his daughter

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2 years ago

Please I need it now

Nana76 [90]

1. A vector $\vec x$ is a unit vector if its magnitude is 1. Given

$\vec A = \dfrac{\sqrt3}2\,\vec\imath - \dfrac12\,\vec\jmath \\\\ \vec B = -\dfrac{\sqrt2}2\,\vec\imath - \dfrac{\sqrt2}2\,\vec\jmath \\\\ \vec C = \dfrac12\,\vec\imath - \dfrac{\sqrt3}2\,\vec\jmath - \dfrac12\,\vec k$

$\vec A$ and $\vec B$ are unit vectors, while $\vec C$ is not, since

$\|\vec A\| = \sqrt{\left(\dfrac{\sqrt3}2\right)^2 + \left(-\dfrac12\right)^2} = 1 \\\\ \|\vec B\| = \sqrt{\left(-\dfrac{\sqrt2}2\right)^2 + \left(-\dfrac{\sqrt2}2\right)^2} = 1 \\\\ \|\vec C\| = \sqrt{\left(\dfrac12\right)^2+\left(-\dfrac{\sqrt3}2\right)^2+\left(-\dfrac12\right)^2} =\dfrac{\sqrt5}2 \neq 1$

2. Given some vector $\vec x$ , you can get the unit vector in the same direction as

$\vec A = -12\,\vec\imath + 9\,\vec\jmath \\\\ \vec B = 15\,\vec\imath-20\,\vec\jmath$

then the unit vectors in the direction of $\vec A$ and $\vec B$ , respectively, are

$\dfrac{\vec A}{\|\vec A\|} = \dfrac{-12\,\vec\imath+9\,\vec\jmath}{\sqrt{(-12)^2+9^2}} = \dfrac{-12\,\vec\imath+9\,\vec\jmath}{15} = -\dfrac45\,\vec\imath + \dfrac35\,\vec\jmath \\\\ \dfrac{\vec B}{\|\vec B\|} = \dfrac{15\,\vec\imath-20\,\vec\jmath}{\sqrt{15^2+(-20)^2}} = \dfrac{15\,\vec\imath-20\,\vec\jmath}{25} = \dfrac35\,\vec\imath - \dfrac45\,\vec\jmath$

$\vec A = \|\vec A\| \left(\cos(180^\circ-\theta)\,\vec\imath + \sin(180^\circ-\theta)\,\vec\jmath\right) \\\\ \vec A = 25 \left(-\sin(37^\circ)\,\vec\imath + \cos(37^\circ)\,\vec\jmath\right) \\\\ \vec A = -15\,\vec\imath + 20\,\vec\jmath$

$\vec B = \|\vec B\| \left(\cos(180^\circ + \alpha)\,\vec\imath + \sin(180^\circ+\alpha)\,\vec\jmath\right) \\\\ \vec B = 75 \left(-\sin(53^\circ)\,\vec\imath-\cos(53^\circ)\,\vec\jmath\right) \\\\ \vec B = -60\,\vec\imath - 45\,\vec\jmath$

6 0

2 years ago

In the case of a swinging pendulum, Potential Energy is greatest when ____.

GREYUIT [131]

I am almost 100% positive the answer is A.

4 0

2 years ago

Read 2 more answers

Your Friend Wants To Travel Abroad For University Education.Write a Letter Expressing Your Views about his or her intentions and

Elena L [17]

Answer:

ALT TO FRIEND

HI FIREND

COPY BOB IN ALT ACC

CANT GET BAN

───▄▀▀▀▄▄▄▄▄▄▄▀▀▀▄───

───█▒▒░░░░░░░░░▒▒█───

────█░░█░░░░░█░░█──── this is Taco

─▄▄──█░░░▀█▀░░░█──▄▄─

█░░█─▀▄░░░░░░░▄▀─█░░█

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░░░█▀▄▄▄█░▀▀░░

░░░▌░▄▄▄▐▌▀▀▀░░ This is Bob

▄░▐░░░▄▄░█░▀▀ ░░ they have made an alliance

▀█▌░░░▄░▀█▀░▀ ░░ Copy and paste them so we can take over brainly.

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Explanation:

7 0

2 years ago