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3 years ago

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Which of the following is the most likely global climate change?a.a decrease in the overall temperature of the Earthb.an increas

e in the overall temperature of the Earthc.an increase in the number of cold climatesd.no change to global climate

2 answers:

mr_godi [17]3 years ago

7 0

Due to the increase in the greenhouse gases emission, the ability to trap the heat in the atmosphere has increased. Due to which the global warming on the earth has increased. Due to the trapping of the heat, the average temperature everywhere has increased.

Hence, the answer is: An increase in the overall temperature of the earth.

andrew11 [14]3 years ago

5 0

I believe the answer is C. an increase in the number of cold climates

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Answer:

The magnetic field $B_Z$ $= - 6.14*10^{-7} T$

Explanation:

From the question we are told that

The wavelength is $\lambda = 0.3m$

The intensity is $I = 45.0W/m^2$

The time is $t = 1.5ns = 1.5 *10^{-9}s$

Generally radiation intensity is mathematically represented as

$I = \frac{1}{2} c \epsilon_o E_o^2$

Where c is the speed of light with a constant value of $3.0 *10^8 m/s$

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$\epsilon_o$ is the permittivity of free space with a constant value of $8.85*10^{-12} C^2 /N \cdot m^2$

Making $E_o$ the subject of the formula we have

$E_i = \sqrt{\frac{2I}{c \epsilon_0} }$

Substituting values

$E_i = \sqrt{\frac{2* 45 }{(3*10^8 * (8.85*10^{-12}) )} }$

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Generally electric and magnetic field are related by the mathematical equation as follows

$\frac{E_i}{B_i} = c$

Where $B_O$ is the magnetic field

making $B_O$ the subject

$B_i = \frac{E_i}{c}$

Substituting values

$B_i = \frac{184.12}{3*10^8}$

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Generally the wave number is mathematically represented as

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Substituting values

$n = \frac{2 \pi}{0.3}$

$= 20.93 \ rad/m$

Next is to obtain the frequency

Generally the frequency f is mathematically represented as

$f = \frac{c}{\lambda}$

Substituting values

$f = \frac{3 *10^8}{0.3}$

$= 1*10^{9} s^{-1}$

Next is to obtain the angular velocity

Generally the angular velocity $w$ is mathematically represented as

$w = 2 \pi f$

$w = 2 \pi (1* 10^9)$

$= 2 \pi * 10^9 rad/s$

Generally the sinusoidal electromagnetic waves for the magnetic field B moving in the positive z direction is expressed as

$B_z = B_i cos (nx -wt)$

Since the magnetic field is induced at the origin then the equation above is reduced to

$B_z = B_i cos (n(0) -wt) = B_i cos ( -wt)$

x =0 because it is the origin we are considering

Substituting values

$B_z = (6.14*10^{-7}) cos (- (2 \pi * 10^{9})(1.5 *10^{-9}))$

$= - 6.14*10^{-7} T$

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Explanation:

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Answer:

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