Answer:
the correct answer is B
Newton/columb
I would appreciate if my answer is chosen as a brainliest answer
<span>Density = mass/volume
10g/2mL=5g/mL
Atomic mass= protons + neutrons
Atomic number=protons
In a neutral atom, electrons = protons
15 amu-7 atomic number = 8 neutrons, 7 protons and 7 electrons</span>
John carry the heaviest load.
<h3>How to find out who is carrying the heavy load?</h3>
Write down given data from questions:
Board=510cm X 510mm.
Cylinder head with dimensions=43cm X 250mm.
Cylinder lies across the board 210cm from john.
Find out: Who is carry the heaviest load?
Calculation:
We assume that mass of cylinder head = x kg
Then weight=x x 9*81
W=9.81x Newton.
Weight per unit length= Weight/Total leanth
Weight per unit length= 9.81x/43
(w/l)=0.23x N/cm
From equation contition: ![(F_{J} +F_{T} =9.81x n)](https://tex.z-dn.net/?f=%28F_%7BJ%7D%20%2BF_%7BT%7D%20%3D9.81x%20n%29)
(210+21.5)
![F_{T} (510)=9.81 x (231.5)](https://tex.z-dn.net/?f=F_%7BT%7D%20%28510%29%3D9.81%20x%20%28231.5%29)
![F_{T} =4.452x N.](https://tex.z-dn.net/?f=F_%7BT%7D%20%3D4.452x%20N.)
![F_{J} =9.81x-4.452x](https://tex.z-dn.net/?f=F_%7BJ%7D%20%3D9.81x-4.452x)
![F_{J} =5.358 xN](https://tex.z-dn.net/?f=F_%7BJ%7D%20%3D5.358%20xN)
Therefore ![F_{J} \geq F_{T}](https://tex.z-dn.net/?f=F_%7BJ%7D%20%5Cgeq%20F_%7BT%7D)
To learn more about mass per unit length, refer to:
brainly.com/question/24180692
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Answer:
1. A only
Explanation:
First law of thermodynamics it sates that energy of the universe is constant.It is also known as energy conservation law.
Therefore according to the first law of thermodynamics ,the thermal energy of the system is unchanged.
Second law of thermodynamics states that ,it is impossible to make a device which take heat from higher temperature energy resource and give 100 % work without heat rejecting.
Therefore only option A is correct.
1. A only