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3 years ago

How do you calculate joules? someone please help me I beg

Physics

1 answer:

Gnoma [55]3 years ago

5 0

Answer:

<h2>Joules = Watts × Seconds</h2>

Explanation:

If you multiply the number of watts by the number of seconds, you'll end up with joules.

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At what speed, as a fraction of c , is a particle's total energy twice its rest energy

WINSTONCH [101]

The rest energy of a particle is
$E_0=m_0 c^2$
where $m_0$ is the rest mass of the particle and c is the speed of light.

The total energy of a relativistic particle is
$E=mc^2 = \frac{m_0 c^2}{ \sqrt{1- \frac{v^2}{c^2} } }$
where v is the speed of the particle.

We want the total energy of the particle to be twice its rest energy, so that
$E=2E_0$
which means:
$\frac{m_0c^2}{ \sqrt{1- \frac{v^2}{c^2} } }=2m_0 c^2$
$\frac{1}{ \sqrt{1- \frac{v^2}{c^2} } }=2$
From which we find the ratio between the speed of the particle v and the speed of light c:
$\frac{v}{c}= \sqrt{1- (\frac{1}{2})^2 } =0.87$
So, the particle should travel at 0.87c in order to have its total energy equal to twice its rest energy.

3 0

3 years ago

Two tuning forks struck simultaneously produce a beat with a frequency of 2 Hz. The frequency of one fork is 364 Hz. What are th

Kitty [74]

Answer: If the other two frequencies are F and F1 then;

F-364=2

F=364+2

F=366Hz

364-F1=2

F1=364-2

F1=362Hz

Hence the two possible frequencies are 362Hz and 366Hz

Explanation:

5 0

4 years ago

In the picture above, what is the period of the pendulum? (Remember to include a unit)

-BARSIC- [3]

69 i agree with her hope this helps

6 0

3 years ago

Sience : What causes the different seasons on Earth?

olga2289 [7]

Earth would need to be tilted in its axis that causes seasons.

4 0

3 years ago

How is a flywheel constructed to maximize its rotational inertia?

BigorU [14]

Answer:

It is constructed with a high mass and a high raidus.

Explanation:

The rotational inertia I for every object is calculated as:

cMR^2 = I

where c is a constant, M is the mass of the object and R the radius of the object.

So, for a flywheel, the rotational inertia is calculated as:

I = $\frac{1}{2}MR^2$

Then, for constructed a flywheel with the maximun rotational inertia we have to set the maximum mass and the maximun radius.

6 0

3 years ago