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3 years ago

In order to create an electromagnet, you would

1 answer:

8 0

It is fairly easy to build an electromagnet. All you need to do is wrap some insulated copper wire around an iron core. If you attach a battery to the wire, an electric current will begin to flow and the iron core will become magnetized. When the battery is disconnected, the iron core will lose its magnetism.

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An incident electromagnetic wave is polarized and its E vector has a maximum value of 6 Volts/m. It is incident on a polarizer w

adell [148]

To solve this problem it is necessary to apply the equations related to the law of Maus.

By the law of Maus we know that

$I = I_0 cos^2 \theta$

Where,

$I_0$ = Intesity of incident light

I = Intensity of polarized light

With our values we have that

$I_0 =$ 6V/m

$\theta = 45\°$

Then

$I = 6*cos^2(45)$

$I = 3V/m$

Therefore the maximum value of the transmitted E vector is 3V/m

7 0

3 years ago

It takes 23 seconds to hoist a rescue diver of mass 80 kg from the ocean surface to a helicopter hovering 23.9 meters above the

tino4ka555 [31]

Answer:

840 W

Explanation:

The energy expended in hoisting the diver up is given by

$E = mgh$

m is the mass of the diver, g is the acceleration due to gravity and h is the height.

Using the values in the question and taking g as 9.8 m/s²,

$E = (80\text{ kg})\times (9.8\text{ m/s}^2)\times (23.9\text{ m}) = 18737.6\text{ J}$

The power is given by

$P = \dfrac{E}{t}$

t is the time.

Hence,

$P = \dfrac{18737.6\text{ J}}{23\text{ s}} = 841.678\ldots \text{ W}\approx 840\text{ W}$

4 0

3 years ago

A uniform solid sphere rolls down an incline without slipping. if the linear acceleration of the center of mass of the sphere is

Ulleksa [173]

A uniform solid sphere rolls down an incline without slipping. If the linear acceleration of the center of mass of the sphere is 0.19g, then what is the angle the incline makes with the horizontal?

3 0

3 years ago

An instrument that measures wind speed is called a(n ________.

Oduvanchick [21]

The instrument that measures wind is called anemometer. Anemometer not only measures wind, but also, this measures the direction of the wind. And anemometer is also a common device used in a station weather. It is dervived from the greek work anemos which means wind.

7 0

3 years ago

The surface or material that underlies a two-dimensional work of art is called the ____.

Paul [167]

The surface or material that underlies a two-dimensional work of art is called the support.

5 0

4 years ago