Answer:
c. Eggs of earthworms
Explanation:
The actual formation of earthworms is by existing earthworms laying eggs.
The other answers are all separate from earthworms, though they are all found in the area with the earthworms.
Helpful ways: braking - it makes the wheels slow down faster, friction from the chain
harmful: when you fall and slide across the ground, when you get your leg stuck in the chain
As the water boils at a certain temperature, phase change happen without change in its temperature. The heat associated is called the latent heat of vaporization. We obtain the heat required by multiplying the mass of the water to the latent heat of vaporization.
Heat = 0.018 x <span>2.3 x 10000000 = 41400 J</span>
To generate clean energy the mayor my build the fooling type of energy plants:
wind farms
solar power plants
wave power plants
Explanation:
At the seaside there are winds all over the year and that can be transformed in electrical energy by a wind turbine. The mayor can build a on-shore wind farm (reduced consts) and may also build off-shore wind farms (but these have an increased cost).
The second option is to build solar power plants. It will be cost effective if the people in the town will install solar panels on the building roofs. In this way you decrease the costs with the transportation of electrical energy.
The third option is to install wave power plants which harvest energy from the sea waves. It is a rather new technology, in comparison with the other two, but the initial consts can be amortized over time.
All three options will provide clean energy.
Right now nuclear plants have a very expensive initial costs and they may not be afforded by small towns.
Learn more about:
clean energy sources
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The total charge passing a given point in the conductor from t = 0 to t = 1/240 s is 12000π Coulombs
<h3>Total charge through a conductor</h3>
A conductor is a substance that allow current and electricity to pass through it.
The expression that will be used to calculate the current is expressed s:
I(t) = 100 sin (120πt)
where
I is in amperes and t is in seconds.
Since dQ = Idt = I(t) = 100 sin (120πt)
On integrating
Q = 100*120πcos(120πt) |¹/¹²⁴⁰₀
Substitute the limits
Q = 100 * 120π
Q = 12000π Coulombs
Hence the total charge passing a given point in the conductor from t = 0 to t = 1/240 s is 12000π Coulombs
Learn more on total charge through a conductor here: brainly.com/question/15083960
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