What is cell in electricity?

Physics

1 answer:

agasfer [191]4 years ago

7 0

Answer:

An electrical cell is a device used to generate electricity, or to make chemical reactions by applying electricity.

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After 60 days, 100g of a certain element has decayed to only 12.5g.

vagabundo [1.1K]

Answer:

8 days

Explanation:

3 0

3 years ago

Amy gets up from her seat on a train to move closer to the front. Just as she begins to walk forward, the train stops at a stati

Ivahew [28]

Have you ever been in a bus, a train, or a car ?
What happens to you when it stops suddenly ?

A body in motion continues in motion unless
an external force acts on it and makes it stop.

Amy's body keeps moving forward when the train stops.
She pitches forward, and if she doesn't reach out and grab
a seat or a seated person, she may lose her footing and fall
on her face.

Choice - 'A' is a very good explanation.
The other choices aren't.

'C' is a good hunch, but it only applies to her feet.
The rest of her keeps going.

'D' is nonsense. There are no mysterious forces of
'repulsion' or 'attraction' on the train.

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3 years ago

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name the device used often to change the resistance without changing the voltage source in an electric circuit

timofeeve [1]

<em>the devices which are used to change the resistance in a circuit are called
<u>resisitors...
</u>the fact that they effect the voltage or not simply depends upon the type of resistor used in the circuit ...:)

</em>

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3 years ago

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Calculate Neptune's mass given the acceleration due to gravity at the north pole is 11.529 m/s2 and the radius of Neptune at the

dolphi86 [110]

Answer:

The mass of Neptune is $1.023\times 10^{26}$ kilograms.

Explanation:

From Newton's Law of Gravitation, the gravitational acceleration of Neptune is determined by the following formula:

$g = \frac{G\cdot M}{R^{2}}$ (1)

Where:

$G$ - Gravitational constant, measured in cubic meters per kilogram-square second.

$M$ - Mass of the planet, measured in kilograms.

$R$ - Radius of the planet, measured in meters.

$g$ - Gravitational acceleration, measured in meters per square second.

If we know that $G = 6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}}$ , $g = 11.529\,\frac{m}{s^{2}}$ and $R = 24.340\times 10^{6}\,m$ , then the mass of Neptune is: