The answer for this problem is clarified through this, the
system is absorbing (+). And now see that it uses that the SURROUNDINGS are
doing 84 KJ of work. Any time a system is overshadowing work done on it by the
surroundings the sign will be +. So it's just 12.4 KJ + 4.2 = 16.6 KJ.
Based on the voltage of the batteries and the internal resistance, the bulb's resistance is 4.595 Ω
<h3>What is the resistance?</h3>
First, find the total emf of the circuit:
= 2 x 1.5V
= 3.0V
The internal resistance is:
= 0.255 + 0.15
= 0.405 Ω
The resistance in the bulb is:
= 3.0 / 0.600 - 0.405
= 4.595 Ω
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Answer: A reference point
Explanation: If an object is in motion then its distance from another object is changing. Whether an object is moving or not depends on your point of view. For example, a woman riding on a bus is not moving in relation to the seat she is sitting on, but she is moving in relation to the buildings the bus passes. A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point. You assume that the reference point is stationary, or not moving.
