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masha68 [24]
3 years ago
14

You heat your home with electricity generated by a coal-fired power plant. Because energy from the coal is lost in the productio

n and distribution of the electricity, it would be more efficient to just burn the coal in your home (although certainly less convenient!). How much less coal would you need to burn if you heated your home directly with coal, instead of using electricity generated from coal? You would need about
Physics
1 answer:
AlladinOne [14]3 years ago
6 0
Well since you can only heat your home/water with it and your home stove is less efficient than say the zero-emmisions one in gillete WY. and the distribution cost placed on top of that. you would pay more than the coal-made-electricity. plus you would burn more for the same effect. and coal decomposes in oxygen so that's not EPA condoned anymore. so the answer is. . . none. its more advantageous to just use the electricity
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The energy transferred from the water in the kettle to the surroundings in 2 hours is
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The Last one ☝️ I think
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What will change the velocity of a periodic wave?
Gwar [14]
The one that will change the velocity of a periodic wave is : 
B. Changing the medium of the wave
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2 years ago
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If two bicycles of same masses move at different velocities,it will be easier to stop the bicycle that is moving at lower veloci
s344n2d4d5 [400]

Answer:

It is easier to stop the bicycle moving at a lower velocity because it will require a <em>smaller force</em> to stop it when compared to a bicycle with a higher velocity that needs a<em> bigger force.</em>

Explanation:

The question above is related to "Newton's Law of Motion." According to the <em>Third Law of Motion</em>, whenever an object exerts a force on another object <em>(action force)</em>, an equal force is exerted against it. This force is of the same magnitude but opposite direction.

When it comes to moving bicycles, the force that stops their movement is called "friction." Applying the law of motion, the higher the speed, the higher the force<em> </em>that is needed to stop it while the lower the speed, the lower the force<em> </em>that is needed to stop it.

8 0
2 years ago
If the pressure exerted by the liquid of density 500kg/m3 is 20,000Pa. What is height of liquid column.
gregori [183]

The height of the liquid column is 4.08 metres.

4 0
2 years ago
A spherical balloon has a radius of 6.55 m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of a
Ksju [112]

Answer:

M_1 = 317.7 kg

Explanation:

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m = 0.179(\frac{4}{3}\pi R^3)

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now total mass of balloon + helium inside balloon is given as

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now we know that total weight of balloon + cargo = buoyancy force on the balloon

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1200.7 + M_1 = 1518.4

M_1 = 317.7 kg

3 0
3 years ago
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