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3 years ago

Hey hi can someone help?

Physics

2 answers:

Alecsey [184]3 years ago

6 0

Answer:

2k25%*degrees

Explanation:

I think so

Maslowich3 years ago

3 0

Y Component will 25cos(35) and X component will 25sin(35) only if the object is on an incline

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3 years ago

Which item has the most carbohydrates?<br> 1.Soda<br> 2.Cereal<br> 3.Wheat bread<br> 4.Rice

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3 years ago

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3 years ago

Please give me the answer of this

8_murik_8 [283]

Answer:

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Explanation:

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3 years ago

At some instant and location, the electric field associated with an electromagnetic wave in vacuum has the strength 57.5 V/m. Fi

n200080 [17]

Answer:

$1.9167\times 10^{-7}\ T$

$2.9247498849\times 10^{-8}\ J/m^3$

$8.7742496547\ W/m^2$

Explanation:

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

E = Electric field = 57.5 V/m

c = Speed of light = $3\times 10^8\ m/s$

Magnetic field is given by

$B=\dfrac{E}{c}\\\Rightarrow B=\dfrac{57.5}{3\times 10^8}\\\Rightarrow B=1.9167\times 10^{-7}\ T$

The magnetic field strength is $1.9167\times 10^{-7}\ T$

Energy density is given by

$u=\dfrac{1}{2}\epsilon_0E^2+\dfrac{1}{2\mu_0}B^2\\\Rightarrow u=\dfrac{1}{2}\times 8.85\times 10^{-12}\times 57.5^2+\dfrac{1}{2\times 4\pi \times 10^{-7}}(1.9167\times 10^{-7})^2\\\Rightarrow u=2.9247498849\times 10^{-8}\ J/m^3$

The energy density is $2.9247498849\times 10^{-8}\ J/m^3$

Power flow per unit area is given by

$\dfrac{P}{A}=uc\\\Rightarrow \dfrac{P}{A}=2.9247498849\times 10^{-8}\times 3\times 10^8\\\Rightarrow \dfrac{P}{A}=8.7742496547\ W/m^2$

Power flow per unit area is $8.7742496547\ W/m^2$

7 0

3 years ago

Hey hi can someone help? ​

Hey hi can someone help?