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Marat540 [252]
3 years ago
5

Energy in an ecosystem is first obtained by

Physics
1 answer:
Likurg_2 [28]3 years ago
6 0

Answer:

The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

You're welcome if I helped!

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C) An identical spring is pulled with a force or 75 N The elastie limit of the spring is 72N
tiny-mole [99]

Answer:

Spring cannot return to its original, since a part of its deformation is <u>plastic</u>, not <u>elastic</u>.

Explanation:

Physically speaking, stress is equal to the axial force divided by effective transversal area of spring. In addition, springs have usually a linear relationship between stress and strain in <u>elastic region</u>, since they are made of ductile materials. Axial force is directly proportional to axial stress, which is also directly proportional to axial strain.

Then, if force is greater than force associated with elastic limit of the spring, then spring cannot return to its original, since a part of its deformation is <u>plastic</u>, not <u>elastic</u>.

8 0
3 years ago
Which switch configuration creates a short circuit?
lara31 [8.8K]
I think the answer would be Switch 1 open; switches 2, 3, and 4 closed. It is letter D. This will happen when there is a low resistance and a high circuit so from the choices above, when two bulbs are open and one bulb is close, so there is a low resistance and high voltage.
6 0
3 years ago
Razona si, en las experiencias de Faraday, el efecto producido moviendo el circuito será el mismo que el producido moviendo el i
const2013 [10]

Answer:

moving the circuit or the magnet gives the same result

Explanation:

The faraday effect establishes that the temporal variation of imaginative flow produces an electric potential

          fem = \frac{d \phi }{dt}dfi / dt

the magnetic flux is

         Ф = B. A = B A cos θ

suppose for simplicity that the angle is zero so cos 0 = 1

         Φ = B A

By analyzing this expression, the change in magnetic flux can converge while keeping the magnetic field fixed and varying the electric field or keeping the electric field fixed and varying the magnetic field.

Consequently moving the circuit or the magnet gives the same result

5 0
3 years ago
A coin is made of ______​
lys-0071 [83]

Answer:

coins made with the combination of copper zinc and Nickel

A cloth is made of fabrics

A towel is made from cotton

an umbrella is made up of fiberglass

a sweater is made up of wool

hope it helps

please mark me as the brainliest

5 0
3 years ago
The power needed to accelerate a projectile from rest to its launch speed v in a time t is 42.0 W. How much power is needed to a
ExtremeBDS [4]

Answer:168 W

Explanation:

Given

Power needed P=42 W

initial Launch velocity is v

Energy of projectile when it is launched E=\frac{1}{2}mv^2

Power=\frac{Energy}{time}

Power=\frac{E}{t}

42=\frac{\frac{1}{2}mv^2}{t}--------1

Power when it is launched with 2 v

E_2=\frac{1}{2}m(2v)^2=\frac{4}{2}mv^2

P=\frac{2mv^2}{t}---------2

Divide 1 & 2 we get

\frac{42}{P}=\frac{1}{2\times 2}

P=42\times 4=168 W    

7 0
3 years ago
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