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3 years ago

Which quantities appear in the equation for the magnetic field component of an electromagnetic wave?

Physics

1 answer:

tankabanditka [31]3 years ago

5 0

Answer:

The speed of light (c)

Explanation:

The equation that relates the magnetic field component of an electromagnetic wave the the electric field component of the wave is:

$E=cB$

where

E is the magnitude of the electric field component

B is the magnitude of the magnetic field component

c is the speed of light in a vacuum, whose value is

$c=3.0 \cdot 10^8 m/s$

Re-arranging the equation to solve for B, we find:

$B=\frac{E}{c}$

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A 2800 kg truck moving at 12 m/s to the right hits a stopped 1100 kg car. What is the combined velocity the moment they stick to

leva [86]

Answer:

The combined velocity is 8.61 m/s.

Explanation:

Given that,

The mass of a truck, m = 2800 kg

Initial speed of truck, u = 12 m/s

The mass of a car, m' = 1100 kg

Initial speed of the car, u' = 0

We need to find the combined velocity the moment they stick together. Let it is V. Using the conservation of momentum.

$m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{(m_1+m_2)}\\\\V=\dfrac{2800\times 12+0}{2800+1100}\\\\V=8.61\ m/s$

So, the combined velocity is 8.61 m/s.

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2 years ago

What is your theory on frame of reference?

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What is your theory on frame of reference?

Answer:

It is the idea of seeing something from a different perspective

Explanation:

Hope this helps!

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3 years ago

a block that is 80 degrees is places next to a 20 degree block. the warmer block heats the cooler block by the process of... A)c

11Alexandr11 [23.1K]

Answer: option B: conduction.

Conduction is the heat transfer that happens between two bodies in direct contact, due to the collision of the molecules, atoms and electrons within the body (microscopical level).

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3 years ago

If two different theories describe experimental observations equally well, can one be said to be more valid than the other (assu

Andreas93 [3]

Answer:

Explanation:

In such situations we cannot determine which one is more valid as both serves the purpose well.

Two theories are carried out in different environment and circumstance keeping different parameters and one can opt for any number of ways to carry out that experiment but what matter at the end is the accuracy they bring.

Each of the theory is a new discovery and follows all the possible logical rules hence it is not possible to decide which one is more valid.

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3 years ago

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Oksanka [162]

Answer:

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Explanation:

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