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4 years ago

How do magnets work?

Physics

2 answers:

Ainat [17]4 years ago

5 0

How do magnets workssss?

Nikitich [7]4 years ago

5 0

The north pole of one magnet attracts the south pole of a second magnet, while the north pole of one magnet repels the other magnet's north pole. So we have the common saying: like poles repel, unlike poles attract. A magnet creates an invisible area of magnetism all around it called a magnetic field.

You might be interested in

Which object moves in simple harmonic motion?\

Rina8888 [55]

<h2>Answer:Stretched rubber band with an mass</h2>

Explanation:

Simple harmonic motion requires a restoring force.

Simple harmonic motion should be periodic.

Option A:

When a rubber band is stretched,the internal forces of the rubber band pulls the band inside.So,internal forces are the restoring forces in a rubber band.

The motion is periodic as well since the the rubber band makes to an fro motion expanding ans contracting.

So,this performs SHM.

Option B:

There is no restoring force and no periodicity.

So,this is not SHM.

Option C:

There is no restoring force and no periodicity.

So,this is not SHM.

Option D:

There is periodicity but no restoring force.

So,this is not SHM.

3 0

4 years ago

A model rocket flies horizontally off the edge of a cliff at a velocity of 50.0 m/s. If the canyon below is 100.0 m deep, how fa

padilas [110]

If the canyon below is 100.0 m deep, the rocket travels from the edge of the cliff 226m in the horizontal direction.

When air resistance acts, acceleration during a fall will be less than g because air resistance affects the motion of the falling objects by slowing it down. Air resistance depends on two important factors - the speed of the object and its urface area. Increasing the surface area of an object decreases its speed.

The correct answer between all the choices given is the first choice or letter A. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

5 0

3 years ago

You are woken up in the morning on the farm by a rooster. The rooster is located 30 meters away on top of the 5 meter barn house

algol [13]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The velocity is $v = 18.73 \ m/s$

Explanation:

From the question we are told that

The distance of the rooster from farm house is $d = 30 \ m$

The height of the rooster from the ground is $h = 5 \ m$

The angle at which the alarm clock is thrown is $\theta = 53 ^o$

Let the velocity at which the alarm clock is thrown be v

So the horizontal component of v is mathematically represented as

$v_h = v cos \theta$

The distance covered by the alarm clock toward the horizontal direction at velocity v is

$d = v_h$

=> $d = v_h = vcos \theta * t$

=> $vcos \theta * t = 30$

substituting for $\theta$

$v (cos (53)) * t = 30$

=> $v * t = 50$

Considering the motion of the alarm clock in the vertical direction

So the vertical component of v is mathematically represented as

$v_v = vsin \theta$

The distance covered in the vertical direction is mathematically evaluated as follows

From the equation of motion we have

$h = vsin\theta * t - \frac{1}{2} g t^2$

$v* t sin\theta - 4.9t^2 = 5$

Recall $v * t = 50$

$50 \ sin \theta -4.9t^2 = 5$

substituting for $\theta$

$50 \ sin (53) -4.9t^2 = 5$

=> $t =\sqrt{7.1289}$

$t =2.673 \ s$

Now

$v * t = 50$

$v * 2.673 = 50$

=> $v = 18.73 \ m/s$

3 0

3 years ago

If friction is increased then the amount of potential energy that becomes kinetic energy does what

emmasim [6.3K]

Increases as well since more friction causes less speed and thus less potential energy and more kinetic energy.

8 0

4 years ago

What is the direction of the field halfway between two horizontal parallel wires if the top wire has a current of 4 A to the lef

Alex777 [14]

Answer:

A) Out of the page.

Explanation:

Right-hand rule points the direction of the magnetic field at any point.

Top wire: Current is to the left. Point your thumb to the left and curl your other fingers around the wire. The tips of the four fingers points the direction of the field at that point. In this case, out of the page.

Bottom wire: Current is to the right. Point your thumb to the right and curl your other fingers around the wire. The tips of the four finger points out of the page again.

So, the total field produced by both wires is directed out of the page.

Another method to figure out the direction is the mathematical method.

Use the B-field formula:

$d\vec{B} = \frac{\mu_0}{4\pi}\frac{Id\vec{l}\times \^r}{r^2}$

The cross product between the direction of the current and the target position gives the direction of the B-field. If the left is -x direction and downwards is the -y direction, then

$(-\^x) \times (-\^y) = +\^z$ for the top wire.

$(+\^x) \times (+\^y) = +\^z$ for the bottom wire.

4 0

3 years ago