energy

quantitative property of a physical system, recognizable in the performance of work and in the form of heat and light

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Notable quotes

“Our decision about energy will test the character of the American people and the ability of the President and the Congress to govern this Nation. This difficult effort will be the "moral equivalent of war," except that we will be uniting our efforts to build and not to destroy.”
— Jimmy Carter, address to the nation on the energy problem (April 18, 1977); Public Papers of the Presidents of the United States: Jimmy Carter, 1977, book 1, p. 656. Carter was quoting William James, who used the phrase in his essay, "The Moral Equivalent of War".
“It is found that the sum of energy of motion and energy of position is always constant. ...Energy is a quantity which can be greater or less but has no direction. ...[E]nergy is conserved, or is indestructible. This form of speech might be applied to other cases of alternate immortality, where one of two things comes into existence on disappearance of the other.”
— William Kingdon Clifford, "Energy and Force" (Mar 28, 1873) A previously unpublished lecture by Prof. Clifford before members of the , as described in Nature (May-Oct, 1880) Vol. 22, pp. 122-124. with an introduction by J. F. Moulton.
“It is important to realize that in physics today, we have no knowledge of what energy is. We do not have a picture that energy comes in little blobs of a definite amount.”
— Richard Feynman, in The Feynman Lectures on Physics (1964) Volume I, 4-1
“We must proceed with our own energy development. Exploitation of domestic petroleum and natural gas potentialities, along with nuclear, solar, geothermal, and non-fossil fuels is vital. We will never again permit any foreign nation to have Uncle Sam over a barrel of oil.”
— Gerald Ford, speech to the Anti-Defamation League of B'nai B'rith, West Palm Beach, Florida (January 26, 1974); reported in Congressional Record (February 4, 1974), vol. 120, p. 2044.
“If you take a bale of hay and tie it to the tail of a mule and then strike a match and set the bale of hay on fire, and if you then compare the energy expended shortly thereafter by the mule with the energy expended by yourself in the striking of the match, you will understand the concept of amplification.”
— William Shockley
“Thus to the plain man there may be no metaphor in...Thomas Young's "kinetic energy" and Michelangelo's figure of Leda. Placed in their customary contexts these present nothing to him but the face of literal truth. To the initiated, however, who are aware of the "gross original" senses as well as the now literal senses, they may become metaphors. There are no metaphors per se....”
— Colin Murray Turbayne, The Myth of Metaphor (1962) p. 18.

Quotes via Wikiquote (CC BY-SA), each with its original source.

On IJR

No public IJR answers mention energy yet. As people ask about it and share their answers, they'll appear here.

Notable quotes

“Our decision about energy will test the character of the American people and the ability of the President and the Congress to govern this Nation. This difficult effort will be the "moral equivalent of war," except that we will be uniting our efforts to build and not to destroy.”
— Jimmy Carter, address to the nation on the energy problem (April 18, 1977); Public Papers of the Presidents of the United States: Jimmy Carter, 1977, book 1, p. 656. Carter was quoting William James, who used the phrase in his essay, "The Moral Equivalent of War".
“It is found that the sum of energy of motion and energy of position is always constant. ...Energy is a quantity which can be greater or less but has no direction. ...[E]nergy is conserved, or is indestructible. This form of speech might be applied to other cases of alternate immortality, where one of two things comes into existence on disappearance of the other.”
— William Kingdon Clifford, "Energy and Force" (Mar 28, 1873) A previously unpublished lecture by Prof. Clifford before members of the , as described in Nature (May-Oct, 1880) Vol. 22, pp. 122-124. with an introduction by J. F. Moulton.
“It is important to realize that in physics today, we have no knowledge of what energy is. We do not have a picture that energy comes in little blobs of a definite amount.”
— Richard Feynman, in The Feynman Lectures on Physics (1964) Volume I, 4-1
“We must proceed with our own energy development. Exploitation of domestic petroleum and natural gas potentialities, along with nuclear, solar, geothermal, and non-fossil fuels is vital. We will never again permit any foreign nation to have Uncle Sam over a barrel of oil.”
— Gerald Ford, speech to the Anti-Defamation League of B'nai B'rith, West Palm Beach, Florida (January 26, 1974); reported in Congressional Record (February 4, 1974), vol. 120, p. 2044.
“If you take a bale of hay and tie it to the tail of a mule and then strike a match and set the bale of hay on fire, and if you then compare the energy expended shortly thereafter by the mule with the energy expended by yourself in the striking of the match, you will understand the concept of amplification.”
— William Shockley
“Thus to the plain man there may be no metaphor in...Thomas Young's "kinetic energy" and Michelangelo's figure of Leda. Placed in their customary contexts these present nothing to him but the face of literal truth. To the initiated, however, who are aware of the "gross original" senses as well as the now literal senses, they may become metaphors. There are no metaphors per se....”
— Colin Murray Turbayne, The Myth of Metaphor (1962) p. 18.

Quotes via Wikiquote (CC BY-SA), each with its original source.