Answer:
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Explanation:
The wheel and axle is a simple machine consisting of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.
Well, since it's C3, we need Tricarbon, and H8 means Octa-, so B is your answer: Tricarbon Octahydride.
Hope this helps~!
Answer:

Explanation:
Consider two solenoids that are wound on a common cylinder as shown in fig. 1. Let the cylinder have radius 'ρ' and length 'L' .
No. of turns of solenoid 1 = n₁
No. of turns of solenoid 1 = n₂
Assume that length of solenoid is much longer than its radius, so that its field can be determined from Ampère's law throughout its entire length:

We will consider the field that arises from solenoid 1, having n₁ turns per unit length. The magnetic field due to solenoid 1 passes through solenoid 2, which has n₂ turns per unit length.
Any change in magnetic flux from the field generated by solenoid 1 induces an EMF in solenoid 2 through Faraday's law of induction:

Consider B₁(t) magnetic feild generated in solenoid 1 due to current I₁(t)
Using:
--- (2)
Flux generated due to magnetic field B₁
---(3)
area of solenoid = 
substituting (2) in (3)
----(4)
We have to find electromotive force E₂(t) induced across the entirety of solenoid 2 by the change in current in solenoid 1, i.e.
---- (5)
substituting (4) in (5)

I think fluids travel faster near the center of pipes and tubes better than at the edges because they are able to travel much faster, and smoother in the center rather than the edges because the fluids have to turn, which could cause the rest of the incoming fluids to stop, which would make it much slower when traveling through the edges than through the center.
Multiply the speed and time to get your answer of how far the runner travels