Dissipation — Science definition

Defined in 2 courses:

Where it is taught

Questions using dissipation

Problem 1

Which statement correctly uses conservation of energy in Energy Transformations, Conservation & Dissipation?
  1. One illustrative result establishes every real condition and needs no further evidence.
  2. Energy that is less useful has been destroyed.
  3. Conservation means every individual object must keep the same energy.
  4. conservation of energy: Energy remains accounted for across a complete system and its transfers.
Answer and explanation

conservation of energy: Energy remains accounted for across a complete system and its transfers.

Energy remains accounted for across a complete system and its transfers. A gives 24 ÷ 120 = 20% as visible light and 96 J in thermal pathways. B gives 30% as visible light and 84 J in thermal pathways. B has a larger modeled light fraction for this purpose, but brightness at the page, price, lifetime, and actual measurements would also matter. Both conserve the stated input energy.

Problem 2

Which statement correctly uses dissipation in Energy Transformations, Conservation & Dissipation?
  1. dissipation: Energy spreading into less readily useful forms or surroundings for the chosen purpose.
  2. Energy that is less useful has been destroyed.
  3. Conservation means every individual object must keep the same energy.
  4. One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation

dissipation: Energy spreading into less readily useful forms or surroundings for the chosen purpose.

Energy spreading into less readily useful forms or surroundings for the chosen purpose. A gives 24 ÷ 120 = 20% as visible light and 96 J in thermal pathways. B gives 30% as visible light and 84 J in thermal pathways. B has a larger modeled light fraction for this purpose, but brightness at the page, price, lifetime, and actual measurements would also matter. Both conserve the stated input energy.

Problem 3

Which statement is scientifically accurate for Energy Transformations, Conservation & Dissipation?
  1. Energy that is less useful has been destroyed.
  2. conservation of energy: Energy remains accounted for across a complete system and its transfers.
  3. Conservation means every individual object must keep the same energy.
  4. Every classroom model reproduces reality exactly.
Answer and explanation

conservation of energy: Energy remains accounted for across a complete system and its transfers.

Energy remains accounted for across a complete system and its transfers. A gives 24 ÷ 120 = 20% as visible light and 96 J in thermal pathways. B gives 30% as visible light and 84 J in thermal pathways. B has a larger modeled light fraction for this purpose, but brightness at the page, price, lifetime, and actual measurements would also matter. Both conserve the stated input energy.

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