Work Is Done on an Object to Increase Its Total

question 39

Multiple Choice

Work is done on an object to increase its total energy. Which one of the following is true?

• A) The total work done must be equal to the energy lost to heat and sound.
• B) Both the kinetic energy and potential energy can be larger.
• C) If the potential energy increases, then the kinetic energy must decrease.
• D) The object must have a larger speed and smaller height above the ground.

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Definitions:

Amines

Organic compounds and functional groups that contain a basic nitrogen atom with a lone pair.

Pyrrolidine

A cyclic secondary amine, presenting as a clear liquid with an unpleasant smell, used as a building block in the synthesis of pharmaceuticals and alkaloids.

Ethylamine

A colorless gas with a fishy smell, used in chemical synthesis, represented by the chemical formula C2H5NH2.

Hybridized

Refers to the concept in chemistry where atomic orbitals mix to form new hybrid orbitals, which can explain the geometry of molecular bonding.