X ≤ −3 or x > 3
inequality form
Answer:
X1 = 2081.64
X2 = 523.91
X3 = 1394.45
Explanation:
See the attached pictures for detailed explanation.
Answer:
T surface = 3.9°C
Explanation:
given data
emissivity 0.6
absorptivity = 0.2
solar radiation is incident rate = 1200 W/m²
solution
we get here surface temperature by equality of emitted and absorbed heat rate that is
Q (absorbed) = Q (heat ) .................1
α Qinc =
T surface = ..........................2
put here value and we get
T surface =
T surface = 276.9 K
T surface = 3.9°C
Huh , what last question JSJS XD
Answer:
The pressure in tank will become 541.3 KPa.
Explanation:
From general gas equation we know that:
PV = nRT
PV = (m/M)RT
P/Tm = R/VM
Now, for initial state:
P1/T1 m1 = R/VM ______ eqn (1)
For Final State, as the gas constant (R), volume (V) and molecular mass of air (M) remains constant;
P2/T2 m2 = R/VM ______ eqn (2)
Comparing eqn (1) and eqn (2):
P1/T1 m1 = P2/T2 m2
Now, we have:
P1 = 400 KPa
P2 = ?
m1 = 2 kg
m2 = 0.6 kg + 2 kg = 2.6 kg
T1 = 20°C = 293 K
T2 = 32°C = 305 K
Therefore,
(400 KPa)/(293 K)(2 kg) = P2/(305 K)(2.6 kg)
<u>P2 = 541.3 KPa</u>