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Alexxx [7]
3 years ago
14

Please help with an explanation for 30 points even if u only do one (but with good explanation)

Physics
1 answer:
Illusion [34]3 years ago
8 0

Answer:

1- 4Ω

Explanation:

if 2Ω is 2 meters, than 4 metres is 4Ω

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2. Which state of matter—solid, liquid, or gas—is the best at conducting heat? Why?
Digiron [165]

Answer:

Best at conductioning heat- Solid

Explanation:

<u><em>In order for heat to conduct it has to pass from particle to particle.</em></u>

A solid has particles closely compacted so the heat is able to tranfer quickly from particle to particle.

A liquid has isn't as compacted it actually has enough space to slide over each other

A gas has very far apart particles and takes heat longer to transfer from one particle to another.

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3 years ago
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When an electron falls from a higher to a lower energy level in an atom, the photon released has a wavelength of 121.6 nm. What
yarga [219]

Answer:

\Delta E=1.64*10^{-18}J

Explanation:

The energy difference between the energy levels involved in the transition of the electron is directly proportional to the frequency of the emitted photon:

\Delta E=h\nu(1)

Where h is the Planck constant. The photon's frequency is inversely proportional to its wavelegth:

\nu=\frac{c}{\lambda}(2)

Here c is the speed of light. Replacing (2) in (1):

\Delta E=\frac{hc}{\lambda}\\\Delta E=\frac{(6.63*10^{-34}J\cdot s)(3*10^8\frac{m}{s})}{121.6*10^{-9}m}\\\Delta E=1.64*10^{-18}J

6 0
3 years ago
Please help me......
snow_tiger [21]
A. The statement is true
6 0
3 years ago
A 3.1-kilogram gun initially at rest is free to
34kurt
The conservation of momentum states that the total momentum in a system is constant if there is no external force acting on the system. The total momentum in the gun bullet system is 0 so it must stay that way.

The momentum of the bullet is mv = 0.015*500=7.5
The momentum of the gun must be the same to keep the total momentum of the system equal to zero, so we know that p = 7.5 for the gun.
Substituting this in we get:

7.5=3.1x
x=7.5/3.1
x=2.42

So the speed of the gun is 2.4m/s.
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3 years ago
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What happens if two plates move away from each other?
Sloan [31]

Answer:

They will sometimes crash into other plates in the process and will rub while they are moving creating earthquakes

Explanation:

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3 years ago
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