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4 years ago

How much ancient plant debris is necessary to form one foot of coal?

1 answer:

3 0

It is said that ten feet of ancient plant debris was needed in order to make one foot of coal. This is true because fossil fuels were formed from plants and animals that lived 300 million years ago in primordial swamps and oceans. <span>Eventually, many of the seas receded and left dry land with fossil fuels like the one you are talking about, coal</span>

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What is the electric flux φ through each of the six faces of the cube? Use ϵ0 for the permittivity of free space?

exis [7]

If total charge Q is enclosed in the surface of cube

then we will have say that total flux linked with all surfaces of the cube will be given by

$\phi = \frac{Q}{\epsilon_0}$

since the position of charge is symmetric with respect to the center of the cube so here this whole flux will be equally linked with each of the face of the cube

So here total 6 faces of the cube is there and the total flux of the charge will equally divide in these 6 faces

so flux linked with each face is given by formula

$\phi = \frac{Q}{6\epsilon_0}$

so each face will have above flux due to central position of charge Q

3 0

3 years ago

You ran a power plant what could you do to make this generator produce electricity

DIA [1.3K]

You could use a magnetic generator or you could use hydraulic power

8 0

3 years ago

The inductor in the RLC tuning circuit of an AM radio has a value of 250 mHmH . You may want to review (Pages 857 - 860) . Part

ANEK [815]

Answer:

The value of variable capacitor is $1.89 \times 10^{-13}$ F

Explanation:

Given :

Inductance $L = 250 \times 10^{-3}$ H

Frequency $f = 731 \times 10^{3}$ Hz

According to the cutoff frequency,

$f = \frac{1}{2\pi \sqrt{LC} }$

Now we find the value of capacitance,

$C = \frac{1}{4\pi ^{2} f^{2} L }$

$C = \frac{1}{4\times 9.85 \times (731 \times 10^{3} )^{2} \times 250 \times 10^{-3} }$

$C = 1.89 \times 10^{-13}$ F

Therefore, the value of variable capacitor is $1.89 \times 10^{-13}$ F

6 0

3 years ago

Why do motors have gaps or breaks throughout the rotor and commutator?

Marat540 [252]

Answer: Its the second option

Explanation:

I have the same text and everything I had did it yesterday and picked the second one and it was right so yea. Hopefully that helps. Is this fro STEM physics

4 0

3 years ago

Leslie is investigating which brand of cell phone has the longest lasting battery.

Sergeeva-Olga [200]

Explanation:

hope it's helpful for you

6 0

3 years ago

Read 2 more answers