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3 years ago

What is a electromagnet?

2 answers:

7 0

An electromagnet is a soft metal core which is made into a magnet by passing the electric current through a coil which is surrounding it.

Marysya12 [62]3 years ago

5 0

A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.

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Is magnesium a metal ?

tatuchka [14]

Yes Magnesium Its Metal

8 0

3 years ago

Can someone please tell me the answer,I can't find the answer XD

Butoxors [25]

Acid rain is rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulfur and nitrogen oxides, which combine with atmospheric water to form acids.

7 0

4 years ago

According to the lecture, all of the following are defense mechanisms except __________.

Liula [17]

<span>According to the lecture, all of the following are defense mechanisms except: Moderate Exercise

A defense mechanism is the actions that people do as an excuse so they don't have to deal with their real problem. Moderate exercise on the other hands is the action that people do to maintain their health.</span>

4 0

4 years ago

The actual depth of a shallow pool 1.00 m deep is not the same as the apparent depth seen when you look straight down at the poo

DedPeter [7]

Answer:

d' = 75.1 cm

Explanation:

It is given that,

The actual depth of a shallow pool is, d = 1 m

We need to find the apparent depth of the water in the pool. Let it is equal to d'.

We know that the refractive index is also defined as the ratio of real depth to the apparent depth. Let the refractive index of water is 1.33. So,

$n=\dfrac{d}{d'}\\\\d'=\dfrac{d}{n}\\\\d'=\dfrac{1\ m}{1.33}\\\\d'=0.751\ m$

d' = 75.1 cm

So, the apparent depth is 75.1 cm.

4 0

3 years ago

The following table shows the duration of a year on some unknown planets of equal mass. Duration of Year Planet Duration of Year

Soloha48 [4]

Gravitational force between sun and planet is given by,

$F=\frac{GMm}{r^{2}}$

Thus, The force of gravitation is inversely proportional to the distance.

Kepler's law states that the square of period of planet is proportional to cube of semi major axis of its orbit.

The time period of planet is more when the gravitational force is less.

Thus, planet Y is closer to earth because sun exert greater gravitational force than planet Z.

8 0

4 years ago

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