An electron volt is: A) the force acting on an electron in a field of 1 N/C B) the force required to move an electron 1 meter C)
1 answer:
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To solve this problem we must keep in mind the concepts related to angular kinematic equations. For which the angular velocity is defined as
Where
Final angular velocity
Initial angular velocity
Angular acceleration
t= time
In this case we do not have a final angular velocity, then
Re-arrange for
Therefore the mangitude of the angular aceleration is 5449.1rad/s²
Answer:
Explanation:
From the first law of thermodynamics
Q=ΔU+W
Q=heat supplies to the system
ΔU=change in internal energy of the system
W= work done by the gas by the system
Q =12 KJ
ΔU==(mR/k-1)ΔT
ΔU=*(460-400)
=14.924 KJ
Q=ΔU+W
W=-2.924 KJ
=
+
=work done by the air
= P(V2-V1)
=mRT2-mRT1
=mR(T2-T1)=0.138*0.287*(460-300)=
=6.33 KJ
=
+
=-2.924-6.33
=-9.26 KJ
Answer:
80%
Explanation:
Thermal efficiency is a measure of the extent to which a heat engine is able to convert to other form. It is measure in percentage.
Thermal efficiency = × 100%
Where is the input energy and
is the output energy.
Given that: = 2400 J and
= 3000 J, therefore:
Thermal efficiency = × 100%
= 80%
The thermal efficiency of the engine is 80%.