Answer:
V = 280.15 V
Explanation:
" The complete question is attached with figure"
Given:
- The capacitance of the capacitor C = 10 nF
- The amount of mass attached to motor m = 4 grams
- The amount of distance it is to be lifted h = 1 cm
- Ignore all other losses in the system
Find:
- The voltage required to lift the mass m through distance h?
Solution:
- The conservation of energy for the entire system is written as:
Work_gravity = U_c
Where,
Work_gravity: Work done by gravity on mass m
U_c: The amount of energy stored in a capacitor
m*g*h = 0.5*C*V^2
V^2 = 2*m*g*h / C
V = sqrt ( 2*m*g*h / C )
Plug in the values:
V = sqrt ( 2*0.004*9.81*0.01 / 10*10^-9 )
V = sqrt ( 78,480)
V = 28.15 V
The tensile stress at the yield point is 286 MPa, the ultimate tensile stress is 509 MPa and the average stress is 1,018 MPa.
<h3>Tensile stress</h3>
I. Tensile stress at the yield point
Tensile stress=Fy/A1=4×90×10^3÷πd1²
=360×10^3÷(2×10^-2)²π
=286 MPa
II. Ultimate tensile stress
Fmax/A1=4×160×10^3÷πd1²
=640×10^3÷(2×10^-2)²π
=509 MPa
III. Average stress at the breaking point
Fd/A2=4×80×10^3÷πd2²
=320×10^3÷(10^-2)²π
=1,018 MPa
Therefore the tensile stress at the yield point is 286 MPa, the ultimate tensile stress is 509 MPa and the average stress is 1,018 MPa.
Learn more about tensile stress here:brainly.com/question/12937199
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Explanation:
Probably a large interest in math and how things works. Many engineering students question the world around them and have a lot of curiosity. It also depends on the type of engineering
Answer:
The claim is false and violate the zeroth law of thermodynamics.
Explanation:
Zeroth law of thermodynamics refers to thermal equilibrium among elements. It states that elements which different temperatures will reach the same temperature at the endgame if they are close enough to interact each other. This temperaure is called <em>equilibrium temperature and it is always a intermediate value between the element with highest temperature and the element with the lowest one. So there is no way </em> a cup of cold coffee on a table can warm up to 80°C picking up energy from the surrounding air at 25°C because the cup can only reach a temperature closer to the surrounding air temperature which will be the equilimbrium temperature for that case.