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tatyana61 [14]
3 years ago
9

What is an example of a system and describe the energy flow through it.

Physics
1 answer:
dolphi86 [110]3 years ago
6 0

Ecosystem is an example of system.

Explanation

The best example of a system is the ecosystem.

The energy flow in the ecosystem starts from the sun which is the primary source of producing energy.

The sun provides energy to the plants and which will transfer energy to the animals or humans consuming them.

The energy is further transferred between the organisms by consumption of other organisms.

Even the decayed organisms are converted to fuel energy and the waste or unused energy is released as heat in the atmosphere.

Thus in the ecosystem, the law of conservation of energy is maintained as the energy transferred by the Sun to other organisms can be again converted to fossil energy once they have decayed.

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Where is the potential energy equal to zero?
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The component of the external magnetic field along the central axis of a 18 18 turn circular coil of radius 27.0 27.0 cm decreas
madreJ [45]

Answer:

Induced current I = 0.44 A

Explanation:

given data

no of turn N = 18

radius  = 27.0 cm

resistance of the coil = 4.50 Ω

time = 2.90 s

magnetic field  = 1.90 T to 0.500 T

solution

we get Induced EMF that is

E = - dφ ÷ dt    ..............1

E = - N × A × (B2 - B1) ÷ Δt

E = N × A × (B1 - B2) ÷ Δt

area of cross section of the coil A = π × r²

area of cross section = 3.14 × (0.27)²

area of cross section = 0.228 m²

Initial magnetic field B1   = 1.9 T

and  

Final magnetic field B2   = 0.5 T

time      Δt = 3.7 s

put here value and we get

E  =  \frac{18 \times 0.228 \times (1.9-0.5)}{2.90}  

E  = 1.98 V

and  

Induced current I is express as

Induced current I = E  ÷ R    ................2

Induced current I = \frac{1.98}{4.5}

Induced current I = 0.44 A

3 0
2 years ago
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