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noname [10]
3 years ago
13

To get an electrical current you have to have a ___ ____.

Physics
2 answers:
Alexandra [31]3 years ago
7 0

Answer :

<em>cu</em><em>r</em><em>c</em><em>u</em><em>i</em><em>t</em><em> </em><em>a</em><em>n</em><em>d</em><em> </em><em>Source</em><em> </em><em>o</em><em>f</em><em> </em><em>c</em><em>u</em><em>r</em><em>r</em><em>e</em><em>n</em><em>t</em><em> </em><em>.</em>

stepan [7]3 years ago
5 0

Answer: you have to have a source of electricity because if not you are not gonna get a "eletrical" current

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In your own words explain efficiency
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Efficiency is completing a task as fast a possible the the least amount of effort.
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A uniform-density 7 kg disk of radius 0.21 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is
GREYUIT [131]

Answer:

\omega = 22.67 rad/s

Explanation:

Here we can use energy conservation

As per energy conservation conditions we know that work done by external source is converted into kinetic energy of the disc

Now we have

W = \frac{1}{2}I\omega^2

now we know that work done is product of force and displacement

so here we have

W = F.d

W = (44 N)(0.9 m) = 39.6 J

now for moment of inertia of the disc we will have

I = \frac{1}{2}mR^2

I = \frac{1}{2}(7 kg)(0.21^2)

I = 0.154 kg m^2

now from above equation we will have

39.6 = \frac{1}{2}(0.154)\omega^2

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3 years ago
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Which condition is a neuron in when the outside of the neuron has a net positive charge and the inside has a net negative charge
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The condition is a neuron in when the outside of the neuron has a net positive charge and the inside has a net negative charge (due to accumulation of more sodium ions) is C. resting potential. T<span>he </span>resting membrane<span> </span>potential<span> of a </span>neuron<span> is approximately -70 mV (mV=</span><span>millivolt)</span>
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Explain how you can use the factors of production to produce a fruit juice in a production company
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The factors of production include Land, Labour, Capital and Enterpreneurship

Explanation:

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7 0
2 years ago
In pairs figure-skating competition, a 65-kg man and his 45-kg female partner stand facing each other both at rest on the ice. I
Lina20 [59]

Answer:

The final velocity of her partner is approximately -1.04 m/s or 1.04 m/s in the opposite direction to her direction of motion

Explanation:

The given parameters are;

The mass of the man, m₁ = 65 kg

The mass of the woman, m₂ = 45 kg

Taking the relative initial velocity of the man and the woman as 0 m/s, we have;

The initial velocity of the man, v₁₁ = 0 m/s

The initial velocity of the man, v₁₂ = 0 m/s

The final velocity of the woman, v₂₂ = 1.5 m/s

The final velocity of the man = v₂₁

Therefore, we have, by the conservation of momentum principle;

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Which gives;

m₁ × v₁₁ + m₂ × v₁₂ = m₁ × v₂₁ + m₂ × v₂₂

Substituting the known values;

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∴ 65 × v₂₁ + 45 × 1.5 = 0

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The final velocity of the man, her partner = v₂₁ ≈ -1.04 m/s.

6 0
3 years ago
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