Today Is a Beautiful Day for a Picnic in the Mountains

question 75

Short Answer

Today is a beautiful day for a picnic in the mountains, so we seal our peanut butter sandwich in a plastic sandwich bag at the base of the mountain.The approximate volume of the sandwich bag not occupied by the sandwich is 200.mL.The pressure at the base of the mountain is 1.0 atm.If the pressure at the top of the mountain is 0.80 atm, what is the final volume of gas in our sandwich bag?

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Definitions:

Armature

The rotating part of an electric machine (motor or generator) within which a current is induced by a magnetic field.

Brushless DC

A type of direct current electric motor (DC motor) that uses an electronic controller to switch the current in the motor, eliminating the need for brushes.

Wound Armature

A component in electrical machines consisting of coils wound around an iron core, which rotates in a magnetic field to induce electromotive force.

Brushes

Sliding contacts, generally made of carbon, used to provide connection to rotating parts of machines.