Answer:
The car's instant speed is 20m/s
Explanation:
a = at + an
The above equation is a vector equation
a is the resultant acceleration
at is the tangent acceleration
an is the normal acceleration
See the attached diagram for solution
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Answer:
Explanation:
The concept of Hooke's law was applied as it relates to deformation.
The detailed steps and appropriate substitution is as shown in the attached file.
Answer:
Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. In other words, Engineering is the use of science and math to design or make things.
Explanation:
Answer:
Given:
P₁ = 500 kPa
T₁ = 860 K
P₂= 100 kPa
T₂ = 460 K
Let's take entropy properties of T1 and T2 from ideal properties of air,
at T = 860K, s(T₁) = 2.79783 kJ/kg.K
at T = 460K, s(T₂) = 2.13407 kJ/kg.K
using entropy balance equation:
![\frac{\sigma _cv}{m} = s(T_2)- s(T_1) - R In [\frac{P_2}{P_1}]](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Csigma%20_cv%7D%7Bm%7D%20%3D%20s%28T_2%29-%20s%28T_1%29%20-%20R%20In%20%5B%5Cfrac%7BP_2%7D%7BP_1%7D%5D%20)
= - 0.2018 kJ/kg. K
In this case the entropy is negative, which means the value of exit temperature is not correct, beacause entropy should always be positive(>0).