n Activity 5: Keeping Track of Energy in Electric Circuit Interactions S2. Repeat question S1 but...

   

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n Activity 5: Keeping Track of Energy in Electric Circuit Interactions S2. Repeat question S1 but for a later time when the battery and motor/fan are in their equilibrium states. That is: Both the battery and the motor/fan are at a constant temperature that is warmer than their surroundings. . The motor/fan is moving at a constant speed and is still pushing air away from it. Page marizing Questions $1. Consider a dry cell battery connected to a fan (which is a motor with blades attached to the axle). When the fan is turned on, it pushes the air away from it. Even though M you cannot see air, it has mass and behaves like an object. So when it moves, it has kinetic energy. Air 14 Moves-> away (Note: Since the purpose of a fan is to move air around, you should explicitly treat the air as a separate object when considering its kinetic energy. However, you can think of the air as simply being part of the surroundings when considering its thermal energy.) a) Draw a G/R diagram for the system of interacting objects (dry cell battery, fan/motor, air, and the surroundings) during the short period of time that the battery and motor/fan are both in their transient states. That is: Both the battery and the motor/fan are still increasing in temperature, but are both already warmer than their surroundings. . The motor/fan is still increasing in speed, but is already pushing air away from it. n Activity 5: Keeping Track of Energy in Electric Circuit Interactions S2. Repeat question S1 but for a later time when the battery and motor/fan are in their equilibrium states. That is: Both the battery and the motor/fan are at a constant temperature that is warmer than their surroundings. . The motor/fan is moving at a constant speed and is still pushing air away from it. Page marizing Questions $1. Consider a dry cell battery connected to a fan (which is a motor with blades attached to the axle). When the fan is turned on, it pushes the air away from it. Even though M you cannot see air, it has mass and behaves like an object. So when it moves, it has kinetic energy. Air 14 Moves-> away (Note: Since the purpose of a fan is to move air around, you should explicitly treat the air as a separate object when considering its kinetic energy. However, you can think of the air as simply being part of the surroundings when considering its thermal energy.) a) Draw a G/R diagram for the system of interacting objects (dry cell battery, fan/motor, air, and the surroundings) during the short period of time that the battery and motor/fan are both in their transient states. That is: Both the battery and the motor/fan are still increasing in temperature, but are both already warmer than their surroundings. . The motor/fan is still increasing in speed, but is already pushing air away from it.

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