Multiple Choice Question
In an engine, fuel and oxygen chemically react and release energy. What happens to the energy NOT used by the engine?
A.
It has been destroyed.
B.
It is lost in the form of heat and sound.
C.
It remains stored in the chemical bonds of the fuel.
D.
It is converted into methane.
B. It is lost in the form of heat and sound.
What is the last step to solving a system of equations?(1 point) Responses Graph the lines. Graph the lines. Make a table of solutions of the linear equations. Make a table of solutions of the linear equations. Check the answer. Check the answer. Estimate the intersection point. Estimate the intersection point.
Check the answer.
Solving Systems of Equations by Graphing Quick Check 2 of 52 of 5 Items Question Is (−2, 6) a solution to the system of these linear equations: x+2y=10 and 3x+y=0 ? Why?(1 point) Responses Yes, because the graphs don’t intersect at (−2, 6). Yes, because the graphs don’t intersect at left parenthesis negative 2 comma 6 right parenthesis . No, because the graphs intersect at (−2, 6). No, because the graphs intersect at left parenthesis negative 2 comma 6 right parenthesis . No, because the graphs don’t intersect at (−2, 6). No, because the graphs don’t intersect at left parenthesis negative 2 comma 6 right parenthesis . Yes, because the graphs intersect at (−2, 6).
No, because the graphs intersect at (-2, 6).
B. It is lost in the form of heat and sound.
To answer this question, we need to understand the basic principles of how an engine works and how energy is transferred.
In an engine, fuel and oxygen go through a process called combustion. During this process, the fuel and oxygen chemically react, producing heat and expanding gases. This heat energy is then converted into mechanical energy, which is used to power the engine and perform useful work.
However, not all of the energy generated by the combustion process is converted into useful work. There are various ways in which the energy is lost, or not utilized by the engine.
The correct answer to the question is B. It is lost in the form of heat and sound. When fuel and oxygen react, a significant amount of energy is lost as heat, which is dissipated into the surrounding environment. This is why engines get hot during operation. Additionally, the ignition and combustion process also generates sound energy, which is emitted as noise.
Option A, "It has been destroyed," is incorrect because energy cannot be destroyed according to the law of conservation of energy. It can only be converted from one form to another.
Option C, "It remains stored in the chemical bonds of the fuel," is also incorrect. While the energy is indeed stored in the chemical bonds of the fuel, this energy is released during combustion and used to power the engine. The energy is not retained in the fuel after the combustion process is complete.
Option D, "It is converted into methane," is unrelated to the question at hand. Methane is a completely different compound and is not directly related to the energy loss in an engine.
Therefore, the correct answer is B. It is lost in the form of heat and sound.