PHYSICS HIGH SCHOOL

Einstein's famous equation indicates that E=mc^2, where c is the speed of light and m is the object's mass. Given this, what is the SI unit for E?

Answers

Answer 1

Answer:

Answer: Joules

Explanation:

Einstein's equation is:

$E=mc^(2)$

Where:

$E$ is the energy

$m$ is the mass and its SI unit is kilogram $kg$

$c$ is the speed of light and its SI unit is meters per second $(m)/(s)$

If we input the units in the equation and make the analysis of the units:

$E=kg{((m)/(s))}^(2)=kg (m^(2))/(s^(2))$

Rearranging the units:

$E=kg (m)/(s^(2))m$

As we know 1 Newton is $1 N=kg (m)/(s^(2))$

$E=Nm$

And 1 Joule is $1J=Nm$

$E=J$ This is correct because the Joule is the SI unit for energy

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Answers

In air

The speed of sound is slowest in air because sound depends on the medium it goes through and it is made from the vibrations passed on by particles in the medium to the next. In the air, the particles are the most far apart compared to the other two medium.

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B. It is reflected.

C. It is refracted.

D. It becomes brighter.

Answers

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Answer: i think the answer is c hope this helps

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Answers

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Answer:

Explanation:

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Answers

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Answers

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