Answer:
Yes
Explanation:
Given Data
Temprature of source=750°c=1023k
Temprature of sink =0°c=273k
Work produced=3.3KW
Heat Rejected=4.4KW
Efficiency of heat engine(η)=
and
Heat Supplied 
η=
η=42.85%
Also the maximum efficiency of a heat engine operating between two different Tempratures i.e. Source & Sink
η=1-
η=1-
η=73.31%
Therefore our Engine Efficiency is less than the maximum efficiency hence the given claim is valid.
Answer:
Explanation:
The difference between mass and weight is that mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the amount of matter in a body. ... Weight usually is denoted by W. Weight is mass multiplied by the acceleration of gravity (g).
I believe i got this correct when i had an assignment with this question. It should be 7 1/2. B!
Responder:
0.0328m
Explicación:
La tasa de transferencia de calor se expresa como se muestra
Q / t = kA∆T / d
Q / t es la tasa de transferencia de calor o la energía consumida
k es la conductividad térmica
A es el área de superficie del cubo
∆T es el cambio de temperatura
d es el grosor Dado que
Q = Potencia × tiempo Potencia = Q / t = 900W
K = 0,025 W / m. K
Área de superficie del cubo A = 6a²
A = 6 (0.75) ²
A = 3.375m²
d es el grosor =?
∆T = T2-T1 ∆T = 105 ° C-28 ° C
∆T = 77 ° C ∆T = 77 + 273 = 350 Kelvin
Al sustituir los valores en la fórmula para obtener el grosor 'd' que tenemos;
900 = 0.025 × 3.375 (350) / día Multiplicación cruzada que tenemos; 900d = 29.53125
d = 29.53125 / 900
d = 0.0328m
El espesor es de 0.0328 m
