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3 years ago

8

Accounts for about 70% of the mass-energy content of the universe. It acts in opposition to gravity.

1 answer:

Talja [164]3 years ago

3 0

I think it’s b because gravity pulls down or tword and that says moving away I could be wrong but I think it’s b

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types of plate boundaries where two plates separate or move apart?? does anyone know please help ??????

Shtirlitz [24]

Erosion i belive it is called

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3 years ago

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From the 1780s to the late 1800s, people thought the amount of land and resources in the West was limited

Sonbull [250]

Answer:true

Explanation:

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3 years ago

In unit-vector notation, what is the torque about the origin on a particle located at coordinates (0 m, −3.0 m, 2.0 m) due to fo

irinina [24]

Answer:

The torque about the origin is $2.0Nm\hat{i}-8.0Nm\hat{j}-12.0Nm\hat{k}$

Explanation:

Torque $\overrightarrow{\tau}$ is the cross product between force $\overrightarrow{F}$ and vector position $\overrightarrow{r}$ respect a fixed point (in our case the origin):

$\overrightarrow{\tau}=\overrightarrow{r}\times\overrightarrow{F}$

There are multiple ways to calculate a cross product but we're going to use most common method, finding the determinant of the matrix:

$\overrightarrow{r}\times\overrightarrow{F} =-\left[\begin{array}{ccc} \hat{i} & \hat{j} & \hat{k}\\ F1_{x} & F1_{y} & F1_{z}\\ r_{x} & r_{y} & r_{z}\end{array}\right]$

$\overrightarrow{r}\times\overrightarrow{F} =-((F1_{y}r_{z}-F1_{z}r_{y})\hat{i}-(F1_{x}r_{z}-F1_{z}r_{x})\hat{j}+(F1_{x}r_{y}-F1_{y}r_{x})\hat{k})$

$\overrightarrow{r}\times\overrightarrow{F} =-((0(2.0m)-0(-3.0m))\hat{i}-((4.0N)(2.0m)-(0)(0))\hat{j}+((4.0N)(-3.0m)-0(0))\hat{k})$

$\overrightarrow{r}\times\overrightarrow{F}=-2.0Nm\hat{i}+8.0Nm\hat{j}+12.0Nm\hat{k}=\overrightarrow{\tau}$

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2 years ago

Magnitudes cuantitativas<br> ejemplos

Kipish [7]

Where is the Picture?

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2 years ago

Write multiples and sub-multiples of second<br><br><br>

gogolik [260]

Explanation:

Submultiples Multiples

Value SI symbol Name

10−1 s ds decasecond

10−2 s cs hectosecond

10−3 s ms kilosecond

I want brainliest plz!!!!!

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2 years ago

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