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2 years ago

I don’t understand ???? I can use any help you can give?

Physics

1 answer:

evablogger [386]2 years ago

3 0

Crust and atmosphere earth outer crust and the mantel is the most important thing about the mantle are is what it is made up if and last is the core

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For a constant voltage, how is the resistance related to the current?

natulia [17]

Answer:

Explanation:

R=V/I

IF you double the resistance, it's become:

2R=(1/2)I

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3 years ago

Name the four forces in physics?

avanturin [10]

Answer:

Gravitational

Electrostatic

magnetic

Frictional

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2 years ago

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The ground state energy of an electron in a one-dimensional trap with zero potential energy in the interior and infinite potenti

ElenaW [278]

Answer:

0.5 eV

Explanation:

$E_1$ = Initial potential energy = $2\ eV$

$E_2$ = Final potential energy

$L_1$ = Initial width

$L_2$ = Final width = $2L_1$

Energy of an electron in a one-dimensional trap is given by

$E=\dfrac{n^2h^2}{8mL^2}$

From the equation we get

$E\propto \dfrac{1}{L^2}$

So,

$\dfrac{E_1}{E_2}=\dfrac{L_2^2}{L_1^2}\\\Rightarrow E_2=\dfrac{E_1L_1^2}{L_2^2}\\\Rightarrow E_2=\dfrac{2L_1^2}{4L_1^2}\\\Rightarrow E_2=0.5\ eV$

The ground state energy will be 0.5 eV

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2 years ago

What is the Potential energy of a magnetic generator

sergiy2304 [10]

Well potential energy is energy possessed by an object of by the position it's in. For example when you hold back a bow and arrow, but before you shoot it you are containing energy by holding the arrow back. So when you start the magnetic generator (pull or turn to start it) before using it for its purpose that is potential energy. I hope this helps.

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3 years ago

Direction of Wave Travel

BaLLatris [955]

Answer:

I THINK it's A but I'm not completely sure

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