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9 Cards in this Set
- Front
- Back
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what's the definition of energy?
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Energy is the ability to work or cause change.
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If an object is in motion, what type of energy does it have?
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We generally think of kinetic energy as the energy of an object's motion. This can be contrasted by considering that potential energy is the energy of an objects position (in a gravimetric field). With kinetic energy, the more mass and the more speed, the more energy. With potential energy, the more mass and the higher we lift it (to a point) the more potential it has to do work.
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Describe nuclear fission and fusion.
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Nuclear fission is when a nucleus divides into two nuclei with smaller masses. Nuclear fusion is the combining of two nuclei to form one nucleus with a larger mass.
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What is friction?
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A force that resists the motion between two surfaces in contact.
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What is thermal energy?
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A specialized term that refers to the part of the internal energy of a system which is the total present kinetic energy resulting from the random movements of atoms and molecules
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how is nuclear energy different from chemical energy?
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Chemical energy is only the result of changes in the electron orbits around nuclei.
In nuclear energy, changes to atomic nuclei occur. In nuclear energy, nuclei are either fissioned (U235 or Pu239), or fused (deuterium + tritium), so that new elements are formed in the process. In chemical changes elements combine or dissociate, but the same elements remain after the changes. |
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What type of electromagnetic wave is most harmful to you?
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Gamma rays, X-Rays, and UV lights
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A hydroelectric power plant uses what type of energy to produce electricity?
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Kinetic Energy.
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What does the law of conservation of energy state?
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It states that energy is never created or destroyed, but just converted.
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