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TEA [102]
3 years ago
9

An electromagnet is a

Physics
1 answer:
alukav5142 [94]3 years ago
5 0

Answer:

An electromagnet is a soft metal core made into a magnet by the passage of electric current through a coil surrounding (wrapped around) it.

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A spherical balloon has a radius of 6.95 m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of a
Aleks [24]

volume of balloon

= 4/3 T R3

= 4/3 x 3.14 x 6.953

= 1405.47 m3

uplift force

= volume of balloon x density of air x 9.8

= = 1405.47 x 1.29 x 9.8

= 1813.05 x 9.8 N

weight of helium gas

= volume of balloon x density of helium x

9.8

= 1405.47 x .179 x 9.8

= 251.58 x 9.8 N

Weight of other mass = 930 x 9.8 N Total weight acting downwards

= 251.58 x 9.8 +930 x 9.8

= 1181.58 x 9.8 N

If W be extra weight the uplift can balance

1181.58 × 9.8 + W × 9.8 = 1813.05 * 9.8

1181.58+W=1813.05

W= 631.47 kg

3 0
3 years ago
In the lesson a thermos is presented as an example of an isolated energy system. How could you change the thermos into an open e
iVinArrow [24]
If you want to change the thermos into an open energy system, you have to remove the lid. Once the lid is removed, the energy is no longer contained inside the thermos bottle. From the bottle, the energy dissipates to the environment.
7 0
3 years ago
Read 2 more answers
3.-¿ Como actuarias tú, si en pleno juego el árbitro toma una decisión, apesar de estar equivocado?¿finalizado el encuentro te d
RideAnS [48]

Answer:

Comprobar explicación

Explanation:

Si el árbitro toma una decisión en el medio del juego, a pesar de estar equivocado, normalmente, como humano, las emociones están destinadas a superarlo, pero de acuerdo con el reglamento, hay conductas aceptables y una protesta llena de emociones. en el árbitro puede salirse de las manos y conducir a más castigos de acuerdo con los libros de reglas.

Después del partido, por lo general, aún me despediría y expresaría mi desagrado tan cortésmente como pueda, pero porque cuando uno se equivoca, las emociones que lo acompañan pueden volverse increíblemente incontrolables, por lo tanto, es mejor mantener el control y no obtener castigado aún más.

¡¡¡Espero que esto ayude!!!

3 0
3 years ago
A 55 kg skier is at the top of a slope. The vertical distance between start and finish is 10m. (a) What is her Potential Energy?
Blababa [14]

Explanation:

Given that,

Mass of a skier, m = 55 kg

The vertical distance between start and finish is 10 m.

(a) The potential energy of a skier is given by :

E=mgh\\\\E=55\times 9.8\times 10\\\\=5390\ J

(b) When she reaches the bottom of the hill, the potential energy is converted to kinetic energy. So,

5390=\dfrac{1}{2}mv^2\\\\v=\sqrt{\dfrac{2\times 5390}{55}} \\\\v=14\ m/s

Hence, her potential energy is 5390 J and at the bottom of the hill she is moving with a speed of 14 m/s.

6 0
3 years ago
How can a liquid be drawn into a pipette safely?
Kazeer [188]
<span>A liquid be drawn into a pipette safely by squeezing a bulb attached to the wide end of the pipette. </span>
4 0
3 years ago
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