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3 years ago

What do we mean by the event horizon of a black hole?

Physics

1 answer:

Fynjy0 [20]3 years ago

6 0

The correct answer is: C. It is the point beyond which neither light nor anything else can escape.

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What is the period of a wave if 3 waves passes every 6 seconds

Naya [18.7K]

Time period = time/no. of waves = 6/3 = 2s

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3 years ago

Determine the magnitude and direction of the force on a 200 m power line carrying a current of 5.0-A due west in a magnetic fiel

bogdanovich [222]

Answer:

Explanation:

l = 200 m

i = 5 A west

B = 6 micro Tesla direction 30 degree north of east

angle between length vector and the magnetic field vector = 180 - 30 = 150 degree

Write the length and the magnetic field in the vector form

$\overrightarrow{l}=- 200 \widehat{i}metre$

$\overrightarrow{B}= 6\times 10^{-6}\left ( Cos30\widehat{i}+Sin30\widehat{j} \right )Tesla$

$\overrightarrow{B}=\left ( 5.2\widehat{i}+3\widehat{j} \right )\times 10^{-6}Tesla$

$\overrightarrow{F} = i \overrightarrow{l}\times \overrightarrow{B}$

$\overrightarrow{F} = 5\times \left ( -200\widehat{i} \right )\times \left ( 5.2\widehat{i}+3\widehat{j} \right )\times 10^{-6}$

$\overrightarrow{F} =- 3\times 10^{-3}\widehat{k}Newton$

Thus, the magnitude of force is 3 x 10^-3 newton and it is directed towards negative z axis direction.

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3 years ago

Which of the following is a part of the digestive system

BlackZzzverrR [31]

The Pancreas

<em>Is an inflammation organ that lies in the lower part of the stomach which plays a big part in the digestive system.</em>

3 0

3 years ago

"If there were no atmosphere, the tiny molecules of gases and dust particles in the air break up and scatter the light of the su

ELEN [110]

if there was no atmosphere,the tiny molecules of gases and dust particles will gather together and rain down while the sun shine on the particles making the color glow because the colors are combining into various of colors looking like the galaxy.

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3 years ago

A. What is the frequency of blue light that has a wavelength of 450 nm?

erastova [34]

Answer

a)Given,

Wavelength of blue light = 450 n m = 450 x 10⁻⁹ m

Speed of light = 3 x 10⁸ m/s

we know,

$c = \nu \lambda$

$\nu = \dfrac{c}{\lambda}$

$\nu = \dfrac{3\times 10^8}{450\times 10^{-9}}$

$\nu = 6.67 \times 10^{14}\ Hz$

b)Given,

Wavelength of red light = 650 n m = 650 x 10⁻⁹ m

Speed of light = 3 x 10⁸ m/s

we know,

$c = \nu \lambda$

$\nu = \dfrac{c}{\lambda}$

$\nu = \dfrac{3\times 10^8}{650\times 10^{-9}}$

$\nu = 4.62 \times 10^{14}\ Hz$

3 0

3 years ago