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4 years ago

I need help on this please

Physics

2 answers:

SVEN [57.7K]4 years ago

6 0

I think its 20 idk you didn’t show the full question

Anuta_ua [19.1K]4 years ago

3 0

Answer is B

If the atom is neutral, uncharged, it will have 10 electrons

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1. cardinal

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3 years ago

Read 2 more answers

The maximum number of electrons in the second energy level of an atom is ____.

ehidna [41]

Your answer will be 8.

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3 years ago

A current of 0.96 amps flows through a copper wire 0.44 mm in diameter when connected to a potential difference of 15 v. how lon

FinnZ [79.3K]

By using Ohm's law, we can calculate the resistance of the wire. Ohm's law states that:
$V=IR$
where V is the potential difference across the conductor, I is the current and R the resistance. Rearranging the equation, we get
$R= \frac{V}{I}= \frac{15 V}{0.96 A}=15.6 \Omega$

Now we can use the following equation to calculate the length of the wire:
$R= \frac{\rho L}{A}$ (1)
where
$\rho$ is the resistivity of the material
L is the length of the conductor
A is its cross-sectional area
In this problem, we have a wire of copper, with resistivity $\rho=1.68 \cdot 10^{-8} \Omega m$ . The radius of the wire is half the diameter:
$r= \frac{d}{2}= \frac{0.44 mm}{2}=0.22 mm=0.22 \cdot 10^{-3} m$
And the cross-sectional area is
$A=\pi r^2=\pi (0.22 \cdot 10^{-3}m)^2=1.52 \cdot 10^{-7} m^2$

So now we can rearrange eq.(1) to calculate the length of the wire:
$L= \frac{RA}{\rho}= \frac{(15.6 \Omega)(1.52 \cdot 10^{-7} m^2)}{1.68 \cdot 10^{-8} \Omega m}=141.1 m$

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4 years ago

What kind of energy involves the flow of positive charges?

solniwko [45]

Electrical

Electrical would be the energy that involves the flow of positive changes

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3 years ago

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The second law of thermodynamics allows us to conclude that which of the following statements are true? The second law of thermo

klasskru [66]

Answer:

The disorder in the universe is increasing with time.

Explanation:

The second law of thermodynamics states that the amount of entropy in the universe increases over time. Entropy expresses the number of different configurations that a system defined by macroscopic variables could assume. Therefore, is can be interpreted as a measure of the disorder, or randomness of a system.

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3 years ago

I need help on this please​

I need help on this please