Answer:
in the explanation below
Explanation:
FANBOYS is a mnemonic device, which stands for the coordinating conjunctions: For, And, Nor, But, Or, Yet, and So.
By using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
<h3>Efficiency of a machine</h3>
- Efficiency is the percent of work put into a machine (input work) to that of the work done by the machine (output work).
- Efficiency of a machine is always less than 100% because the output work is always less than the input work because some of the input work is used to overcome friction.
Efficiency = work output/work input * 100%
Efficiency of fireplaces = 15%
Amount of food required to heat a room to 20°C = 15 kg
Assuming efficiency of 100%, amount of wood required will be X kg:
X = 15% * 15 kg
X = 2.25 Kg
By switching to woodstoves which are 75% efficient, amount of wood required will be Y kg:
Y = 2.25 kg / 75%
Y = 3 kg
Therefore, by using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
Learn more about efficiency of machines at: brainly.com/question/3617034
The movement of the seafloor and the tectonic plates has been responsible for the movement of the continents. The arrows in the model can be represented as "A: S, B: S, C: N, D: N"
<h3> </h3><h3>What are tectonic plates?</h3>
The big pieces of the earth's lithosphere that move is termed the tectonic plates. The movement of the plates has been given as the theory for the formation of the continents, as well as the cause of various disasters, including earthquakes and volcanos.
The model representing the movement of the plates from the center can be given in the N and the S direction. Thus, the representation of the arrows in the model will be: "A: S, B: S, C: N, D: N"
Learn more about tectonic plates, here:
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Answer:
a student measures the length of a building three times
Explanation:
what is the question
