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3 years ago

Which formula can be used to find the magnitude of the resultant vector? R2 = Rx2 + Ry2 R = Rx + Ry R = Rx(cosθ) R = Rx(sinθ)

Physics

2 answers:

Semenov [28]3 years ago

8 0

Answer: $R^2 = R_x^2 + R_y^2$

Explanation:

when we have two perpendicular vectors Rx and Ry, the magnitude of the resultant vector can be found by using Pythagorean's theorem. In fact, the two vectors Rx and Ry correspond to the two sides of a right triangle, of which the hypothenuse corresponds to the resultant vector R. Therefore, by applying the theorem, we get

$R=\sqrt{R_x^2+R_y^2}$

which is equivalent to

$R^2 = R_x^2+R_y^2$

12345 [234]3 years ago

5 0

R^2 = rx^2 + ry^2 !!!!!!!!!!

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Explanation:

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The charge per unit length of the wire is $\lambda$ and the net charge per unit length is $2 \lambda$ .

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(a) Using Gauss's law to find the charge per unit length on the inner and outer surfaces of the cylinder. Let $\lambda_i\ and\ \lambda_o$ are the charge per unit length on the inner and outer surfaces of the cylinder.

For inner surface,

$\phi=\dfrac{q_{enclosed}}{\epsilon_o}$

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$\lambda_i+\lambda_o=2\lambda$

$-\lambda+\lambda_o=2\lambda$

$\lambda_o=3\lambda$

(b) Let E is the electric field outside the cylinder, a distance r from the axis. It is given by :

$E_o=\dfrac{\lambda_o}{2\pi \epsilon_o r}$

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Hence, this is the required solution.

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3 years ago

An enormous thunderstorm covers Dallas-Ft. Worth. Your best friend Clark is a storm chaser and heads to the center of the storm

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Answer:

t = 0.437 s

Explanation:

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t = d / v

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t = 150/343

t = 0.437 s

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3 years ago

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Sergeeva-Olga [200]

Answer:

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Explanation:

we know from newtons 2nd law

F = ma.

we also know that from hookes law we have

F = kx

equate both value of force to get value of acceleration

kx = ma,

where,

k is spring constant = 8.0 N/m

x is maximum displacement 0.10 m

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a = \frac{kx}{m}

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serg [7]

Answer:

The final velocity of the bullet is 9 m/s.

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