Can yall help me? itsmy exam quetion!!!!
1 answer:
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Answer:
the internal energy of the mixture at final state = 238kJ/kg
Explanation:
Given
V= 0.6m³
m=5kg
R=0.287kJ/kg.K
T=320 K
from ideal gas equation
PV = nRT
where P is pressure, V is volume, n is number of mole, R is ideal gas constant , T is the temperature.
Recall, mole = mass/molar mass
attached is calculation of the question.
Answer:
The person can walk 0.0426 m to the right
Explanation:
Moment = Force * Perpendicular moment
The principle of moment states that the sum of clockwise moments should equal the sum of the anticlockwise moments
From the free body diagram attached to this solution. If the moment is taken about B
The length of the plank = 6.1 m
The weight of the plank will act at the middle i.e. 6.1/2 = 3.05 m
Sum of clockwise moments = Sum of anticlockwise moments
(127 * 1.5) + (127*2.5) = (127 * 3.05) + (846 * l)
190.5 + 317.5 = 387.35 + 846l
190.5 + 317.5 - 387.35 = 846l
120.65 = 846l
l = 120.65/846
l = 0.1426 m
Since the person is standing at the 0.1 m to the right of the support, that means he can only walk a distance of 0.1426 m - 0.1 m to the right
The distance the person can walk to the right = 0.0426 m to the right
