added to the engine minus the waste heat
Explanation:
The amount of work done by a heat engine equals the amount of thermal energy added to the engine minus the waste heat.
Thermodynamics is used to measure the energy changes that accompanies physical and chemical process.
In a system;
Internal energy = Quantity of heat added - Work done on it
internal energy is designated as ΔU
quantity of heat as Q
work done as W
ΔU = Q - W
so W = Q - ΔU
some of the heat added added to the system goes as waste heat as no system is 100% efficient.
the work done on a system goes in as thermal energy, internal energy and waste heat
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The Doppler effect determined and supported that the universe was expanding by measuring the Doppler effect in the light emitted from galaxies.
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Heat from burning fuel warms the walls of the firebox section of the furnace in
A. a hot-water heating system.
B. a hot-air heating system.
C. a compressor compartment.
D. an evaporation system.
Answer:
The true statements are;
a.The decrease in the amplitude of an oscillation caused by dissipative forces is called damping
b.An oscillation that is maintained by a driving force is called forced oscillation
Explanation:
To answer the question, we analyze each of the options as follows;
a.The decrease in the amplitude of an oscillation caused by dissipative forces is called damping.
The above statement is true as damped oscillation is one in which the amplitude is decreased by dissipative forces
b.An oscillation that is maintained by a driving force is called forced oscillation.
When a damped oscillator is allowed to oscillate by itself, it will stop eventually. However when a force is applied to maintain the oscillation the oscillation is then known as a forced oscillation
The above statement is true
c.In a mechanical system, the amplitude of an oscillation diminishes with time unless the lost mechanical energy is replaced.
The above statement is only true in damped oscillation system
d.The increase in amplitude of an oscillation by a driving force is called forced oscillation.
Forced oscillation, as described above, is one the maintains the oscillation of damped oscillator, therefore, the above statement is not correct.
