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Questions tagged [energy]

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4
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3answers
111 views

How did Huygens derive the conservation law for of kinetic energy?

In the book 'Energy - The Subtle Concept' by Energy, the Subtle Concept by Jennifer Coopersmith the author says that Huygens was the first to use the term $mv^2$ in physics. He was considering elastic ...
2
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1answer
70 views

How did people figure out the formula for mechanical work, and related it to energy?

What developments led to the definition of Work as the dot product of Force and Displacement vectors? I did some searching but couldn't find a satisfying answer. According to what I have read, the ...
2
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1answer
87 views

When was the energy of the electron first measured?

Can you give a few details? where/how was it measured, was the value .511MeV found right away, etc.. Readers who'd like a proper answer to the question may find this link useful. The value found by ...
1
vote
1answer
120 views

Was annihilation considered in 1905?

The positron was discovered in 1932, did physicist have any knowledge or assumed that matter could be annihilated into energy at the start of XX century?
-2
votes
1answer
49 views

Was the equivalence of mass-energy referred to the rest or kinetic mass? [closed]

Can you explain if einstein's M=C refers to the rest mass of the electron which iss turned into energy by annihilation or to the relativistic/ electromagnetic mass or both? Since at the time ...
1
vote
1answer
113 views

When was relativistic mass first observed?

I counldn't find precise info on who/ when successfully observed relativistic mass increase. The only thing I found by a Google search is that it was first confirmed in 1908 in experiments with ...
2
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1answer
62 views

Who discovered the Virial Theorem?

Who first discovered the Virial Theorem? Who first wrote it down? When? Where? My guess: a 19th century thermodynamicist
2
votes
1answer
74 views

References about the the development of the concept of mechanical work

I'm looking for references about how the concept of mechanical work ("$\boldsymbol{F}\cdot\mathrm{d}\boldsymbol{r}$") or the concept of mechanical power ("$\boldsymbol{F}\cdot\boldsymbol{v}$") came ...
2
votes
2answers
358 views

Why is kinetic energy denoted by the letter $T$ in quantum mechanics?

I think the question is self-explanatory but stackexchange requires me to write something here.
0
votes
0answers
44 views

Query re Physics-related quote about the amount of energy in water

In The Children's Encyclopedia, edited by Arthur Mee which was in print from 1908 to 1964 (Vol 3, p 1614), there is an essay about Energy in which the following is asserted: A man of science once ...
4
votes
2answers
99 views

Who assigned the name “work” to the quantity $\int F\,{\rm d}r$?

I am looking into the historical perspective of how the concept of work and energy came about: who coined the terms "mechanical work" and "energy", and how the concept evolved over time. I know that ...
-2
votes
1answer
88 views

How did crude oil pipelines work before WW2?

Before World War Two, how did pipelines work for crude oil? What kind of metal or plastic were they made out of? What kind of sensors and monitoring did they need? Did they have "pigs" that travel up ...
2
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0answers
65 views

How exactly was the principle of conservation of energy discovered? [duplicate]

How did we come to know that, for example, the quantity Work=Force*distance is conserved?
6
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2answers
176 views

Who was the first scientist to suggest that objects can keep moving without applied force?

In the old days Aristotels argued that object needs a force to keep going in 'space'. Some philosophers, Philoponus and Buridanus (?), later argued that there was a need for some kind of 'impetus'. ...
3
votes
1answer
41 views

Clausius regarding energy

Clausius somewhere wrote (in German): ``The energy of the world is constant.'' This is a well known quotation. What is the source, publication, the rest of the paper? [Obviously he was summarizing ...
7
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0answers
127 views

Landau doubting conservation of energy---and what followed

When the original beta decay experiments seemed to suggest that energy was not a conserved quantity, Landau (among others) proposed that energy conservation was a statistical law rather then a ...
7
votes
2answers
964 views

How did Newton establish the conservation laws in the Principia?

In the contemporary axiomatic description the conservation laws in mechanics are deduced from Noether's Theorem using the homogeneity and isotropy of space and time. How did Newton, if he did, ...
15
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1answer
539 views

What were the early empirical tests of Einstein's mass-energy equivalence $E=mc^2$?

Near the end of Einstein's 1905 paper on $E=mc^2$ he states (in the translation by Perrett and Jeffery): It is not impossible that with bodies whose energy-content is variable to a high degree (e.g....
3
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0answers
185 views

History of Energy

Can anyone suggest me some book/article explaining how and why the quantity named 'Energy' made its way into physics? I have gone through "Lectures on Physics" (Vol. 1) by R.P. Feynman and have been ...
19
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2answers
2k views

What was the vis viva controversy, including its philosophical aspects?

Leibniz's concept of vis visa (literally translated as living force) was a precursor to our modern concept of kinetic energy. His formula for it was close to the modern non-relativistic one: $mv^2$, ...