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2 years ago

What is electricity? Why does it happen?

Physics

2 answers:

Lady bird [3.3K]2 years ago

8 0

Answer:

<h3>Electricity is the flow of charges through a conductor. </h3>

It happens when a force moves the first electron on a surface where they are free to move.

From~Charminglex~

Natali [406]2 years ago

3 0

Answer:

Explanation:

La electricidad es el flujo de cargas a través de un conductor.

Ocurre cuando una fuerza mueve el primer electrón en una superficie donde puede moverse libremente .

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While standing on the edge of the grand canyon, you see a rattlesnake and scream. You hear the echo of the scream off canyon flo

bezimeni [28]

Answer:

1904 m

Explanation:

$\pink{\frak{Given}}\begin{cases} \textsf{ You scream after seeing a rattle snake .}\\\textsf{Scream is heard after 11.2 s .} \end{cases}$

Here we need to find out the depth of the canyon . When you will scream after seeing a snake , the sound produced will travel till the end of the canyon and after hitting the end , it will travel back to you .

So if the depth of the canyon is d (say) , then the total distance travelled by the sound wave will be d + d = 2d .

And we know that the speed of the sound is approximately 340m/s in air , so we can use the formula distance = speed * time to calculate the depth of the canyon . So ,

$\sf \longrightarrow Distance = (Speed)(Time) \\$

$\sf \longrightarrow 2d = 340m/s * 11.2 s\\$

$\sf \longrightarrow d = \dfrac{340m/s * 11.2s}{2} \\$

$\sf \longrightarrow \boxed{\bf Depth_{canyon}= 1904m }\\$

6 0

2 years ago

On which planet can you jump about the same height as Earth? Explain your answer.

Debora [2.8K]

Answer:

Venus and Earth

Explanation:

The force of gravity depends on your mass AND the mass of the planet you stand on. Earth and Venus are about the same size, so they have about the same mass. If you go to Venus, your mass hasn't changed, and the planet mass is almost the same as earth- so the force of gravity on you (AKA your weight) will be the same.

8 0

2 years ago

Read 2 more answers

The following forces act on an object: 10 N north, 7 N south, and 4 N east. What is the magnitude of the net force?

spin [16.1K]

Given data;

Fn = 10 N

Fs = 7 N

Fe = 4 N

force in X direction (Fx) = 4 N

force in Y direction (Fy) = 10-7 = 3 N

Net force (Fnet) = Sq.root[(Fx)² + (Fy)²]

= Sq root [ 4² + 3² ]

= 25 N

Net force acting = 25 N

6 0

2 years ago

Materials that offer little opposition to electron motion are called _________________.

Nuetrik [128]

I believe it is a conductor I am learning this myself so I may be wrong

8 0

2 years ago

Read 2 more answers

What must the charge (sign and magnitude) of a particle of mass 1.45 g be for it to remain stationary when placed in a downward-

sergey [27]

$q = -21 * 10^{-6} C$

<h3>What is Free-fall acceleration?</h3>

The acceleration is constant and equal to the gravitational acceleration g which is 9.8 m/s at sea level on the Earth.

As we know that charge and its sign that remains in equilibrium is under gravity must be such that it will balance the gravitational force by electric force,

mg =qE

$1.45 * 10^{-3}(9.80)=q(600)\\\\q = 21 *10^{6} C\\\\$

and its sign must be negative so that it will have upward electric force

so it is

$q = -21 * 10^{-6} C$

The charge of a particle of mass is $-21 * 10^{-6} C$

Learn more about Free-fall acceleration: brainly.com/question/2165771

#SPJ1

8 0

1 year ago