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3 years ago

15

I NEED HELP!!

2 answers:

Alla [95]3 years ago

7 0

Answer:

X= -4

Step-by-step explanation:

Refer to image

If you need more xplanation just ask in the comments

Firlakuza [10]3 years ago

4 0

Answer:

x=-4

Step-by-step explanation:

-4(x+6)=5x+12

-4x-24=5x+12

-24-12=5x+4x

9x=-36

x=-36/9=-4

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Use ΔDEF, shown below, to answer the question that follows

AVprozaik [17]

Using sine rule, 55 / sin 90 = x / sin(90 - 49)
55 / 1 = x / sin 41
x = 55 sin 41 = 36.08

8 0

3 years ago

Find the magnitude of the net electric field at the origin (created by charges q1 and q2).

Readme [11.4K]

The direction of the net magnetic field is $167.36^{\circ}$

<h3>How to find the magnitude?</h3>

$q_1=-4 \mathrm{nC} \text { at }(0.6,0.8)$

$q_2=6 \mathrm{nC}$ at (0.6,0)

$r_1=$ Distance of $q_1$ from origin $=\sqrt{0.6^2+0.8^2}$

$r_2=$ Distance of $q_2$ from origin $=0.6$

$\mathrm{k}=$ Coulomb constant $$=9$ times $10^9 \mathrm{Nm}^2 / \mathrm{C}^2$$

Electric field is given by

$&E_1=\frac{k q_1}{r_1^2} \\$

$&\Rightarrow E_1=\frac{9 \times 10^9 \times 4 \times 10^{-9}}{\sqrt{0.6^2+0.8^2}} \\$

$&\Rightarrow E_1=36 \mathrm{~N} / \mathrm{C}$

$&\theta=\tan ^{-1} \frac{0.8}{0.6} \\$

$&\Rightarrow \theta=53.13^{\circ} \\$

$&E_1=36 \cos 53.13^{\circ} \hat{i}+36 \sin 53.13^{\circ} \hat{j} \\$

$&\Rightarrow E_1=21.6 \hat{i}+28.8 \hat{j}$

$&E_2=\frac{k q_2}{r_2^2} \\$

$&\Rightarrow E_2=\frac{9 \times 10^9 \times 6 \times 10^{-9}}{0.6^2} \\$

$&\Rightarrow E_2=150 \mathrm{~N} / \mathrm{C}$

The charge $q_2$ is on the $\mathrm{x}$ axis itself and it is pointing towards the origin (left side) so the sign will be negative

$E_2=-150 \hat{i}$

Resultant electric field

$&E=E_1+E_2 \\$

$&\Rightarrow E=21.6 \hat{i}+28.8 \hat{j}+(-150 \hat{i}) \\$

$&\Rightarrow E=-128.4 \hat{i}+28.8 \hat{j}$

Magnitude of electric field is given by

$&|E|=\sqrt{(-128.4)^2+28.8^2} \\$

$&\Rightarrow|E|=121.6 \mathrm{~N} / \mathrm{C}$

Magnitude of the net electric field is $121.6 \mathrm{~N} / \mathrm{C}$

Direction is given by

$\theta=\tan ^{-1} \frac{128.4}{28.8}=77.36^{\circ}$

From the -x axis

$(90+77.36)^{\circ}=167.36^{\circ}$

The direction of the net magnetic field is $167.36^{\circ}$

To learn more about magnetic field, refer to:

brainly.com/question/26257705

#SPJ4

6 0

2 years ago

How closely does a line of best fit matches a set of data?

Nikitich [7]

The answer would be b, hope it helps!

8 0

4 years ago

The local electronic store sells items for 75% of what they pay them for. Tyrone is stocking television for $450 each. What is t

LiRa [457]

First we need to find 75% of $450, so 450x.75=337.5

to find the markup we have to add 450+337.5 to get $787.5.

8 0

4 years ago

Help me with this question

Drupady [299]

Answer:

angle C, D, E = 46, 46, 88

Step-by-step explanation:

sum of angles in a triangle = 180

5x + 38 + 3x + 16 + 3x + 16 = 180

11x + 70 = 180

11x = 180 - 70

11x = 110

x = 110/11

x = 10

angle C = D = 3x + 16 = 3(10) + 16 = 30 + 16 = 46

angle E = 5x + 38 = 5(10) + 38 = 50 + 38 = 88

8 0

3 years ago