<span>Murphy's law is an adage or epigram that is typically stated as: Anything that can go wrong, will go wrong.
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Answer:
The law of multiple proportions states that when two elements can combine in different ratios to form different compounds, the masses of the element combining with the fixed mass of another element result in whole number ratios. This shows that the law of multiple proportions is followed
Explanation:
Answer:
The tension on an object is equal to the mass of the object x gravitational force plus/minus the mass x acceleration. T = mg + ma.
Explanation:
320 degrees Fahrenheit and 160 degrees Celsius
Answer:
560 ft lb
Explanation:
We are given that a heavy rope 40 ft long ,weighs 0.7 lb/ft and hang over the edge of a building 90 ft high.
We have to find the amount of work is done in pulling the rope to the top of the building
Suppose start subdividing the length which is the longest distance any point on the rope can travel into n equal sub-intervals
![0=x_0](https://tex.z-dn.net/?f=0%3Dx_0%3Cx_1%3Cx_2%3C.........%3Cx_n%3D40)
Length of sub-intervals=![\frac{40}{n}](https://tex.z-dn.net/?f=%5Cfrac%7B40%7D%7Bn%7D)
.For each i we choose x_i*![\in[x_{i-1},x_i]](https://tex.z-dn.net/?f=%5Cin%5Bx_%7Bi-1%7D%2Cx_i%5D)
Weight density =0. lb/ft
Using rieman sum we are finding approximation work done
delta x![\cdot x*_i](https://tex.z-dn.net/?f=%20%5Ccdot%20x%2A_i)
Total approximation work done
delta x![\cdot x_i*](https://tex.z-dn.net/?f=%5Ccdot%20x_i%2A)
When n tends to infinity then we get
Total work done
=560 ft lb.
The amount of work is done in pulling the rope to the top of the building=560 ft lb